> set up a private network between all your ~~Google-signed-in~~ devices.

I've been doing something like this as a fun side project. Idea is to get everything to pass through piholes and have both clear and VPN exit nodes. So then I can send some pis to people and we can create an internal network to share things like files, movies, streaming services, whatever. It also can increase security, especially making it easier for people like my parents when I need to fix their computers and I can just block malware for them, to some degree at least. It's also been very useful debugging stuff in my home network while I'm out somewhere else. And I can access any of my anywhere. I'm out traveling? Still got all my movies and stuff.

One big issue is Apple, who doesn't seem to respect DNS and VPNs, especially local network access... the other aspect is that it makes some ssh automation annoying because they will change things, such as getting the name of the current ssid (wtf?!). So I can't just make a conditional in my config to go through TS instead of local network based on that