Made an account just to say that I will not support the bloated mess that is Thunderbird that pushes on you a new way to configure it, a new layout and new workflows with every major update, makes it difficult to set up text-only mail and messes up line breaks every so often with no way to properly configure it, which should be developed by Mozilla, which is flush with money but rather spends it on theming their software and executive salaries.

I switched away from Thunderbird about a year ago and couldn't be happier I have made the change.

I sadly have to agree. The damned thing struggles with a handful of basic stuff, it still has a config UI of which you can't tell head from tail, complete with teeth and whiskers and even a full "about:config" panel à la Firefox hidden underneath. Spell checker. Calendar. Chat client. Complete web-browser internals, with grindy disk-caching. To add insult to injury, the macOS bundle is half a fxxxing GiB in size (universal flavor, but still).

What do you use now?

This is downvoted but needs to be said. Thunderbird was an amazing 90's style piece of software that has unfortunately been been changed into a more "modern" look, with excessive white space and power-user hostile work flows.

It was near perfect, just needed better search, pretty much.

I liked the old style, too. Nevertheless there is View → Density → Compact / Default / Relaxed.

Exactly. It used to be good and they're making it worse every day.

“90s style” seems to be a compliment in some posts and a negative in others.

Very likely user’s age perspective.

It’s absolutely correct though.

What did you switch to?