Meshtastic (Software and hardware).

You are right, they just can copy what they already did in mobile.

Im waiting to see how big corpos will ruin Linux.

Check Wio L1 Pro and sensecap t1000. Not the cheapest if you compare with DIY nodes, but both are plug and play (or buy and play).

Meshtastic instead meshcore. The former is pure mesh the latter needs repeaters.

You are right about that a reverse proxy does not protect. But I can not relate that with security through obscurity.

Security through obscurity in OSS lol

This is the main reason I had in my head about pull backups. Thanks for the explanation.

Do pull backups instead of push backups: Backup server connects to local machine.