GlytchMeister
I appreciate all the thoughtful recommendations.
I think he's stuck on the Proton UI, I think it feels much more familiar for people who are used to things like gmail and google calendar. Perhaps he will just need to suck it up and use google play services with the proton suite. And maybe make the switch to protonvpn and ditch mullvad to take advantage of the VPN that he's already paying for (and not using) with proton.
On the jabber/cheogram front, he would need to pay for 3 numbers on something like jmp.chat right? I guess that would add another $10/month cost or so roughly...
Yes, I also have had mixed experiences with silent.link. He doesn't care to go non-kyc on the sim front (although maybe its a worthwhile cause), he uses a SIM card in the US that was purchased non-kyc but is effectively burned anyway as everyone knows that number is associated with him so it is easily linkable to him via social graph (and I'd imagine via location tracking).