Is the prevailing advice still not to bother with self-hosting email?

Unfortunately, yes. Here’s a fantastic blog post from someone who gave up on self-hosting last year due to the vast number of problems with self-hosting. The post also does a great job at pointing out why the death of self-hosting email is so bad in general, but still regrettably concludes that it isn’t worth it in any scenario right now.

god I wish that were me

parses HTML with regex

This is really what brings the meme together, it’s just so… chef’s kiss

Am I missing a reason for such a change?

They wanted to fall in line with what all the Chromium-based browsers do.

That said, there is a way to get it to start asking you what to do with files again (though I don’t remember how), but it still always saves the file to your Downloads folder (because that’s what Chromium-based browsers do) which there is no option to change yet as far as I’m aware. To be honest, I’m not sure they ever will implement that as a feature, but I really hope they do because I hate having to go manually cleaning out my downloads when just letting me dump them to a temp dir would make life so much easier.