Thunderbird + K9 Mail are my way to go, too.

Though I mostly do like the redesign, since it fixes some long standing issues with Thunderbird (e.g. not being able to select a multi line message view ("cards view"), instead of the traditional table view.) The search bar being always on top annoys me each time I open it, so I understand a more long time Thunderbird user might have more nitpicks. Almost all of the changes can be reverted through settings, which I find awesome.

I still have pgp signs, but no one has used it to encrypt back to me in years. Don’t know why I keep those on there and active

Me too. I mean if I got an email with someone's public key attached I'd send an encrypted reply. One day the person you're emailing will eventually do the same lol. (I mean I do get people sending me encrypted emails sometimes, but most of the time it's "wtf is this .asc file you've attached to this email")

The redesign is actually what convinced me to switch to Thunderbird. Otherwise I would've never used it since for me it was an eyesore!

The refactor fixed a ton of issues