I'm still on Nextcloud but gave Opencloud a trial run this week. Seems promising but I'm gonna give it time to mature - the setup was a nightmare, the out of the box compose setup is a giant mess, trying to use any OIDC that's not keycloak is a pain (why do they use hardcoded client_ids????), and the Android app still feels very limited.
That being said, the speed difference was wild, and it does feel like it's going to my next go-to once it matures a bit. Nextcloud is an outdated behemoth that I'm looking forward to replacing, but for now it does everything I need and does it pretty well.