Here's a quick look at how our redesigned app menu (e.g. "Hamburger" menu) is progressing.
On the left is Thunderbird 102.
On the right is Thunderbird 111 from our Daily channel.
(Both running on Linux.)
Hopefully you'll notice it just LOOKS better. Crisper font readability, and matching icons for each action.
Update notifications and Sync sign-in populate the top, and it's now much faster to get to your Density and global Font Size settings.