NextCloud does feel slow. What I want is not only a cloud service that does lots of common tasks, but it also should do it lightly and simply.
I'm extremely tempted to write a lightweight alternative. I'm thinking sourcehut [1] vs GitHub.
Take a look at OpenCloud. It's a Go-based rewrite of the former OwnCloud team.
It works very well, has polished UI and uses very little resources. It also does a lot less than Nextcloud.
Just compare comparable products.
Nextcloud is an old product that inherit from Owncloud developed in php since 2010. It has extensibility at its core through the thousands of extensions available.
So yaaay compare it with source hut ...
I made one such lightweight alternative frontend: https://github.com/mickael-kerjean/filestash