You paid once for Office. Microsoft can still switch it to read-only.
A one-time purchase was supposed to mean the software was yours. In mid-2026 Microsoft scheduled paid-for, installed copies of Office for Mac to drop to view-only. The file on your disk is untouched. The program that reads it was the part that was ever really leased, and that is the part worth designing storage around.
“Perpetual license” was always a slightly strange phrase. It promised that a one-time payment bought something permanent, the opposite of a subscription, software that was simply yours once the receipt cleared. In mid-2026 a lot of people who took that promise literally found out where its edges were. Microsoft scheduled installed, paid-for copies of Office 2019 and 2021 for Mac to drop into a reduced-functionality mode: you can still open your documents and read them, but you cannot edit or save. The files are untouched. The application that reads them is the thing being switched off, on a timer, from somewhere that is not your computer.
What actually happened
The trigger is mundane, which is part of why it is worth understanding. The Office apps check a certificate to confirm they are licensed, and that certificate has an expiry. When it lapses (the exact date is still being pieced together in the threads, somewhere in the back half of 2026) the apps fall back to view-only. Office 2019 has no fix, because the build cannot be updated to carry a renewed certificate. The retroactive part is the sting: when Office 2019 reached end of support back in 2023, Microsoft's own page told customers the apps would “continue to function.” That assurance was quietly removed from the page before the view-only change was announced. None of it requires the customer to have done anything. The software sat on the disk, paid for, and the terms around it shifted underneath it.
The part that is not really about Microsoft
This reads like a Microsoft story, and it is a useful one, but the lesson is not “Microsoft is uniquely bad.” It is structural, and it applies to almost any software that phones home to check whether it is allowed to run. There are two different things people fold together when they say they “own” something digital. One is the file: the .docx, the photo, the spreadsheet, the bytes on the disk. The other is the program that opens it. You can own the first outright. The second you mostly license, even when the license is sold as one-time and permanent, because “permanent” is a claim about the vendor's future behavior, and the vendor keeps a hand on a switch you cannot see.
This is the quieter cousin of a worry the self-hosted forums were already chewing on: whether you can still install the apps you choose. That one is about getting software onto a device. This one is sharper in a specific way. The app was already installed. It was already paid for. It was already running. And it still got turned down, remotely, with nothing required from the person who bought it. Installation was never the only place a vendor could reach in.
Why this is really a storage question
If the program can be switched to read-only but the file cannot, then the durable thing you own is the file, and the practical question becomes whether your file is in a shape that outlives the program. Two properties do most of the work. The first is open or well-documented formats. A .docx, a .txt, a .jpg, a .pdf can be opened by many programs, so losing one reader is an annoyance, not a wall. A format only one vendor's app can read is a different risk; if that app goes view-only, the file effectively goes view-only with it. The second is storage you control. If the bytes live on a drive in your house rather than inside a service that bundles the storage and the app together, then swapping the reader is something you can actually do, because nobody else is holding the file hostage to the app.
Harbor Dock sits at that second property and nothing more. It is a small ARM board with a USB drive you reach over a private Tailscale network, a place to keep the files so that whatever happens to the apps, the .docx is still a .docx on a disk you own, openable by the next program you choose. It does not make Office editable again. It does not pick your formats for you. It just makes sure that when an application layer changes its mind about you, the layer underneath it did not.
The honest tradeoffs
Owning the file does not rescue you from a format only one app understands. If your documents live in a proprietary format with a single viewer, keeping them on your own drive helps with availability but not with editability; the real fix there is exporting to something open while you still can, which is its own chore and not one this post can do for you. Storage you control is the floor, not the whole building.
And none of this is a reason to panic or to rip out every paid app today. Most software you run will not be switched off next quarter, and a one-time purchase is still often a better deal than renting the same thing forever. The point is narrower. Treat “perpetual” as a description of intent, not a guarantee, and keep the things you genuinely cannot replace, your own documents and photos, in formats and on storage that do not depend on any one company continuing to feel the same way about you. Microsoft just demonstrated, on software people paid for outright, how quickly that feeling can change. The file is the part you get to keep. Store it like you mean it.