If you want to self host your contacts and calendars and have multiple users, I still don’t think there is anything better. I hope Open Cloud gets there eventually, but right now its only the beginning.

the base install is still pretty lean, its only hulking if you enable all their new junk, but if you don’t enable all that, the default, at least when installed it was quite lean.

No clue. But its large project. I’ve been using it since of was CyanoGenMod.

Get on LineageOS.

There isn’t any difference. The team who was developing OCIS left own cloud and forked OCIS into OpenCloud. They’ll continue developing OpenCloud.

OoenCloud is a fork of this.