Given the thumbs limited movement, I came to a conclusion that 2 keys are comfortably reachable, but to reach the third thumb key, the thumb needs to get into a weird and uncomfortable position. That was my problem with the corne I had and I just stopped using the innermost thumb key because of that. Do you have a similar experience?
That is why I have those for keys I rarely use, such as 'esc' and 'del'. Relatively rare - as they are obviously used frequently enough but not really when typing.
And then I hit them with my middle finger instead, or rather smash them as it requires the whole hand to move slightly.
So in my case does not affect speed or comfort (not a frequent VIM user etc)
But if I only had two thumb buttons I would be ok.
Thumb tuck is awful, and is one of my biggest complaints with Corne-style keyboards. I’m building a Dasbob in the hopes that the thumb arc is more comfortable, but we’ll see.
