I agree. Keeping your data private is just not a big enough motivation. For me though the big issue is making sure one keeps access to their data forever. It’s so easy these days to use everything from one vendor and then get access shut off with no recourse. That is IMO the biggest fear everyone should have these days.
Yes, the only solution is self-hosting and yes it requires being your own sysadmin and it’s hard and not convenient. That’s why I’m building https://github.com/ibizaman/selfhostblocks. It’s a NixOS collection of modules that sets up services that fit well together and have declarative setup for LDAP and SSO. They have integrated backups, https and other features required for self-hosting. Also, the LDAP and SSO setup is tested with e2e NixOS VM tests that use playwright to make sure users can login if they have access.
I’m hoping to lower the bar to self-hosting significantly.