> https://blog.thunderbird.net/files/2026/07/post-screenshot-0...

Just another reminder what people who designs these things do not use them. Probably at all.

Useless left bar - eating space, useless top bar - eating much more limited vertical space, stupid arrows in BL corner without meaning or sense, stupid hamburger menu on the top right corner - because if you don't move the cursor a lot means you are not actually working.