If you use an IMAP email client the ProtonMail Bridge works great on Linux. VPN works well from the command line, though the GUI is still pretty clunky and RAM heavy and either way they really need to make Wireguard and Stealth available on Linux already.

We can hope, but it’s more likely they’ll be like, “hey, that’s an idea, let’s all do this!” The most likely thing they’ll do is absolutely nothing, though.