I really liked the Claws UI. I stopped using it because I wanted something more portable with more features (Thunderbird), and the whole UI freeze single thread

I really liked the Claws UI. I stopped using it because I wanted something more portable with more features (Thunderbird), and the whole UI freeze single thread thing was a bit painful. I am personally only interested in technogy that makes me productive, not tech that looks good. I want to be on the computer for as little time as possible.