How is Angular adding just a sprinkle of js to your web app? Isn't the ouput of building an Angular app a full SPA?

I am using the "original" angular-js, not the newer Angular whatever version it is now. It's not a full SPA. I just include angular.js and put the ng stuff in my HTML. Maybe the new Angular is different?

Yes, angular 2 (which means anything after angularJS) is a full on SPA just like react is.

I think stimulus is more like angularJS. But modern angular definitely isn’t.

But how would one backup their self hosted apps? I imagine a cron job to create snapshots then upload them to a cloud provider. Isn't there a self hosted app for that as well?

For data I care about, the data is hosted on a NAS that incorporates an encrypted snapshot backup strategy with off-site storage in Google Drive.

Configuration I tend to store in a git repository that I back up.

For the VMs/whatever, I just document the setup and, in the case of a disaster, would just rebuild. It'd be a gigantic PITA, but the data and configuration are the important bits. The rest is just labour.

That said, this is why I don't self-host truly critical infrastructure like email or messaging. Everything I run are things I could live without for a while if I had to.

rsync to external USB HDD in my case. I cycle two 8TB externals between my home and safe deposit box for offsite storage. I swap them and then do a fresh rsync of all my jails/etc.