I remember looking at ProntonMail 3 years ago, before I settled on Fastmail instead. To be clear, I have no intention of leaving Fastmail; they have the perfect feature set for me, and have been forthright and competent when it comes to publishing details regarding the problems that have cropped up with their service. I have nothing but respect for the Fastmail team. Russia is in the top 3 countries for which the blocking of Fastmail doesn't concern me; no service is immune to this kind of government interference.

That said… just to refresh my memory, and in case anything ever does happen to Fastmail in my country… isn't ProtonMail the one that had the WORST UI I've ever seen, where every click within the settings was a new maze embedded within another maze? I remember the UI for one of these popular and "secure" email hosts being so ultimately gross, as if it was designed and coded by a 10 year old who just discovered HTML with no knowledge of CSS, where it was just pages after pages of checkboxes and radio buttons with no documentation? Was that ProtonMail, or one of the other very few and far between options?

I remember only having looked at a couple of the modern options to cut my ties with Google, and Fastmail was so far above and beyond the other "viable options", such that it wasn't even really a choice. One of the options clearly looked like a lot of low-level work had gone into security, but that it was effectively unusable from the perspective of the users–including admins–who had to contend with its interface?