So much talk, nothing to back it up. Blatant PR move.
In terms of optimization, Gentoo is the best you’re gonna get, but the word “convenience” makes me hesitant to recommend it to you.
Arch is minimal, and has many resources/guides on battery optimization (Especially for ThinkPads), but if you’d like to learn something else, Void is the way to go.
If you’re looking for a tiling WM, I can wholeheartedly recommend bspwm. Lots of control and customization, but pretty easy to configure when you understand it. Just know, it might be a hard change going from stacking to tiling.
Suicide linux