In contrast, with Baikal, every time I get a new phone, I have to remember I self host it, then figure out which machine it's running on. Other than that, it's completely maintenance free.
(Usually I'm nervous that sync broke since I last checked three+ years ago, so I download a backup of the DB and confirm it's actually working!)
It has pretty web interface, but it was just unusable where it mattered.
That said, for file syncs I do prefer Seafile over Nextcloud. I don't think I'm the only one that prefers Nextcloud just for contact/calendar sync because Mailcow uses the Nextcloud platform just to accomplish that, with file sync disabled.
On desktop the sync integration is fine. It's only on mobile that the experience is lacking.
I also disabled every module and plugin I didn't consider essential.