Yeah, the parent's implication is just wrong:

> As previously stated, this is only an issue for non-practiced typers. With practice, it no longer feels like stretching. It just becomes muscle memory.

Becoming a good typist doesn't magically change your pinkie from being the weakest finger on your hand to the strongest. That's basic anatomy. And, specifically if you are a good typist, then your neutral hand position will absolutely involve stretching your pinkie to hit enter/backspace/shift - they're exactly wrong with their assertion.

I'm vaguely aware of the Kinesis Advantage - it looks like a pretty solid ergonomic keyboard (although it may not be for me because it's not a split keyboard and my shoulders are pretty wide). Does the software do QMK stuff like mod-tap?

Yes, firmware on the Advantage 2 (what I have) does allow some QMK type stuff like mod-tap. They call it "tap and hold". It's more limited than QMK from my understanding (e.g., only 1 layer, tap and hold only on certain keys) but for my uses cases it's been fine.

While it's not a true split, the key wells are ~6" apart which is plenty IMO. They do have the similar Advantage 360 Professional which is a true split and uses ZMK for more programmability.