Small note, when programming, there's other keys involved which allow for hierarchical navigation (ctrl, alt tab, up/down/left/right keys), which adds both some technical challenges by broadening the keyset and cognitive challenges (but of course code itself is highly cognitive.

I try to avoid the mouse, but I usually queue (mentally) a lot of keypresses at max speed, while the only bottleneck is the loading speed of the computer.

For example: alt tab (change window to browser), fn+F5 (refresh website , Ctrl Shift (change brower tab), fn+f5, ctrl shift tab (back to original tab), alt tab (back to editor or command line), etc...