I switched away from Dropbox to Syncthing https://syncthing.net/ a few years ago. Running it on Windows, Mac and Linux (I don't use it on mobile) to keep all manner of files in sync across a bunch of machines. While it doesn't have all the shell integration and end-user friendliness of Dropbox, it also doesn't have the pitfalls like (non-optional) telemetry and constant up-sell.
I did the same. Plus also I'm using on my Android phone. Replaces Dropbox completely unless I want to share something with other people. But for that case I usually use Sharing feature from Synology NAS.
I also have Syncthing installed on my home server which gets backed up. So I have a copy of all my files backed up there, in the event a laptop goes missing or dies.
The only use case I haven't yet covered is an off-site backup of my Syncthing folder, which would be sensible. I just don't know who I can trust with it.