It wasn't mentioned in the list, but I like Photoview; it uses your existing file structure (rather than its own structure or a database), works with read-only access, accepts external syncing like Syncthing, and can handle multiple users. Not sure how it compares on features, but I just wanted something basic anyways, so I'm happy with it.

We need a mobile app? Believe it or not, JavaScript, right away. We have the best/worst software in the world because of Javascript.

At least they (hopefully) won't be getting even worse?

I use VSCode and SourceGit. SourceGit is similar to Fork (which I've used before), but it's FOSS and cross-platform (Windows/macOS/Linux).

Let’s build a ship out of it.

For KeePassXC itself, no. I use KeePassium on iOS, which seems to be compatible with most of KeePassXC’s features.

I can believe it. A big part of finance and accounting runs off of Excel. Even when it shouldn’t, or if better tools are available.

If you’re using KeePassXC, it supports them right now. I’m using them on a few websites with the browser extension. Your mileage may vary, of course.

It looks very nice!