> It seems like most of those are apps where I'm creating or working on something by myself and then sharing it later.

It is interesting. I've thought about things I don in non-messaging apps (which are online0first for obvious reasons), and all of them create something, which can be EXPORTED to on-line presence, but doesn't require connected app.

Code? I write it locally and use separate app to share it: git. Yes, code is collaborative creation (I'm working in the team), but it is still separate tool and I like it, as I control what I'll publish for my colleagues.

Photos? Of course I want to share result, but I'm working on RAW files with non-destructive editing and I want to share final bitmap (as JPEG) and not RAW data and editing steps.

Same with music, if I create one (I doesn't).

Texts must be polished in solitude and presented as final result (maybe, as typographically set one, as PDF).

All my "heavy" applications are and should be offline-first!

Or offline only. I can use an online drive and share a link to the result. Email is there for easy commenting. Or chat for quick collaboration.