Earlier quoted context omitted.
It would be nice if they had a tor presence so there would be no need to traverse an exit node. A lot of other privacy-forward sites do exactly this.
They do https://protonmail.com/tor
So Proton users who like to connect via Tor onion services have been faced with a choice of either staying on the old version of ProtonMail, or giving up on connecting via a Tor onion service. It definitely leaves the impression that they don't care much about Tor anymore, or that it's at best an afterthought for them.