4 

 Yes 

 Great idea, especially since I’m just about to modify my onion relay.

 

 First time boot, it should give option for highest security mode, but default 4? 

 Or to be able to choose. High medium or low security at any time. Not sure if thats hard to make happen but for us normies its all so confusing. A simple level system with the explanation of each ones tradeoffs 🤓🤷 

 4 

 or maybe 3, but enable Tor automatically for .onions when the first .onion relay is added?

as Tor is forbidden in some countries, using it without user action could get people in trouble