I had a horrible experience with nextcloud on a pi. I have a great experience on a good server. It stores files. It does that very well for me. Clients work reliable.
Nextcloud apps are sometines good and sometimes not. It can do everything. One should let navidrome serve music and not nextcloud. Mealie is for recipes. Jellyfin for videos and immich for images. Paperless for documents.
Nextcloud is file storage, backup, syncing and maybe collab. That’s what I expect and that’s what I get.