[survirtual]

As someone who recently migrated off of Dropbox, you can get most of the features with open source systems like Syncthing and a self hosted server.

The main complication to implement is encryption at rest for the data (I use luks2 on a hd and the fs of a raspi controller) and secure remote access (wireguard works really well and is easy to manage).

I wireguard into my remote systems and have Syncthing configured only to local network (no relays etc). It works beautifully; not missing dropbox at all.

I am still working out a viable alternative for things like document scanning, but I have no regrets owning my data.