I've never used nextcloud, but I always imagined that the point is you can run services but then plug in any calendar app etc. You don't have to be running nextclouds calendar, I thought. Did I misundestand how it works?
I would assume that the people for whom a slow web based calendar is a problem (among other slow things on the web interface) are people who want to be using it if it performed well.
They wouldn't just make a bad slow web interface on purpose to enlighten people as to how bad web interfaces are, as a complicated way of pushing them toward integrated apps.
In my case, I want file/photo syncing, calendar syncing, and contact syncing.
Nextcloud provides all 3 in a package that pretty much just works, in my experience (despite being kinda slow).
The Notes app is a pretty nice wrapper around a specific folder full of markdown files, I mostly use it on my phone, and on my desktop I just use my favorite editor to poke at the .md files directly.
Oh, and when a friend group wanted a better way to figure out which day to get together, I just installed the Polls app with a few clicks and we use that now.
I am a bit disappointed in the performance, but I've been running this setup for years and it "just works" for me. I understand how it works, I know how to back it up (and, more importantly restore from that backup!)
If there's another open-source, self-hosted project that has WebDAV, CalDAV, and CardDAV all in one package, then I might consider switching, but for now Nextcloud is "good enough" for me.
