Thanks, I thought about something like that as well, but figured it'd be more hassle in the long run. I like to keep my mail in one basket.
But honestly, I feel like there just isn't a good solution anyway. Email comes from simpler times and any encryption is bolted on and either awkward to use or has some problems with functionality. Hell, even Proton's bridge was a pain to get running properly with send-email because for some reason it insisted on reformatting outgoing mails. I honestly wonder if I should even bother at this point, because most of the stuff I use email for isn't even private. It's mostly corporate communication and mailing lists which are public anyway. All private communication goes over other channels (and some of which are arguably even worse than email, like Discord).
Not saying that this is the conclusion everyone should come to and YMMV, but spending the last weeks combing through the email landscape this feels like the realization I'm starting to arrive at, because I want my email to just work.

Such meme. Much wow. I see we’re continuing with giving dumb names to everything the Muskrat is involved in. Glad that hasn’t changed.