I also use Fastmail and I am a happy customer. My eyes are open. I make no assumption that my mail is private. I think the email analogy is actually very accurate. It’s as secure as postal mail. Maybe slightly more secure than a post card.

I’m happy to be supporting a slightly smaller provider. I don’t have to admin anything and I still feel like I’m contributing to an open ecosystem. Plus I own my domain so I can always change providers.

I have made peace with the compromise.