I love the concept for this. Syncthing is pretty good but it is annoying to have it running all the time on Android.

I’d love to use something like this to sync my Obsidian md files between computer and phone just when needed. I suspect this could be baked into to an Obsidian plugin to make it pretty seemless for folks.

If your laptop supports esim you can checkout https://esimdb.com/ which as a pretty comprehensive list. Most of these are prepaid for X months and you get Y GB of data. So could fit what you need.

Writing Wikipedia articles about topics I’m interested in. Great way to learn more and share it with others.