Ah, that is a good point. I am using 6.5.0 kernel atm, as part of the HWE (hardware enablement) package, which supports QuckSync / hardware encoding of my 12th gen intel processor. I did a quick search, but did not find HWE for Debian is that correct?
You can easily selfhost Seafile and make a ‘dropbox’ like system with as many users you like, and as large a storage you can handle / afford. Although there is an enterprise version, the community edition provides with many features to make it really a great service. It is mighty fast, and has native clients for many different platforms, in addition to using the Seafile website to acces, upload and download files.
I never hosted Nextcloud, but from what I read, it is a beast with way too many features to fit my use case. Seafile is doing one thing very well.