As a user the simple answer is that I'll always use a regular application instead of a "local-first" web app when I have the ability. "Local-first apps" are the worst of everything - crappy, dumbed down web UI; phoning home, telemetry, and other privacy violations; forced upgrades; closed source, etc. At work, I don't have a choice, so it's Google Docs or Office 365 or whatever. And in that context it actually makes…
What does any of this have to do with local first? Most online only apps have this stuff too.