The pornhub blog is surprisingly good reading every once in a while. They take their data analysis seriously.

Depending where you live, you may also need to heat your house anyway, so you really aren’t losing any energy at all by using the oven.

I’m similar to you. Used Dvorak for quite a while but switched back to Qwerty. I never really had any speed gains but I definitly had a lot of comfort gains.

Those are not nearly as conveniently located for left handed use though. Having z x c and v all easily reachable with my left pinky on control and my right hand on my mouse tops any other benefit of another keyboard layout.