Re: " technical and interface debt accumulated over the past ten years"
And it isn't an easy codebase to contribute too. I looked into it years back because honestly I use that email client all day every day in work.
I would have gone mad years ago if I had to use outlook.
(I remember asking myself, why is there no "edit as new" button !?!!?!)
Don't get me wrong, I'm not a great coder or anything, but I spend so much of my work day in thunderbird, Firefox and a terminal I wanted to try fix a few bugs. I nope'd out of there pretty quick tho. Massive respect for people volunteering their time for this