I don't think I really push it, but I find it just right for self-hosting my calendar, contacts, photos, and files.

I'd agree that it has gotten better over time. I'm glad we have Nextcloud around.

I always had terrible trouble keeping it (and before it, Owncloud) updated and in sync with available dependencies on my Debian host. A few years ago, when I built a new NAS, I installed a snap, and that's been the ticket. It's pretty close to flawless now.