[sankhao]

Hardcore vim user with UHK here. I actually love that the caps lock key is remapped to esc in the firmware, so I always have the Esc where I expect it on any computer I plug it in (this is not unique to UHK of course). In fact on the UHK, there is no "caps lock" key, it reads "mouse".

[Jedd]

Hardcore vim users use ctrl-[ instead. : )

Despite being two keypresses, this is usually faster to type, or at the least to return to home position from, and those keys are probably more consistently placed than the ESC key between vendors / models.

[rgoulter]

If you use "home row modifiers" (holding down f/d/s/a or j/k/l/; acts as Shift/Ctrl/Win/Alt), then it's less reaching for ctrl.

Although I'd also recommend making Esc available on a thumb cluster.