

I do use nextcloud for my small consultancy team but I dislike it immensely, mostly due to personal preferences.
I think I pretty much just don’t like having one platform that does everything. I want to self host my own cloud, I don’t want to self host a thing that provides a cloud.
Additionally, and this really is just a personal preference, I dislike php projects almost as much as Java.
Primarily I use nextcloud’s file sync. This aspect is IMO extremely well implemented. It seems to work very reliably.
We do use contacts and calendars. If there were good alternatives I would switch to them but sabreDav et al lacks a good UI. I’m aware you can disable this functionality in nextcloud.
Anything else that can potentially be integrated is better hosted separately IMO.
There’s a use case for this but who knows how big this niche is, and ultimately that’s what will determine success or failure.