[justtocomment]

Something to be aware of:

most (all?) of these keyboards give the thumbs more to do than merely pressing the "space" key. This is awesome, because thumbs are strong and relatively quick.

However: with the exception of those sculpted keyboards (Dactyl-ManuForm et.al.), the thumb keys are triggered by lateral thumb movement, which can be troublesome.

I had absolutely no problems using traditional keyboards for ~30 years, but decided to proactively switch to a split keyboard (ReDox) nonetheless.

Mostly it's great, but I developed pain in my thumbs from the constant uncommon (to me) lateral thumb movement.

I replaced the thumb switches with lighter ones and remapped my keyboard layout to use only 4 of the available 12 thumb keys, but it's still not ideal.

I'm thinking about building one of those sculpted keyboards now.

[wolrah]

This is one of the reasons I chose a Moonlander over an Ergodox for my first split keyboard, the ability to fold the thumb cluster down to an angled position seemed like it'd be more natural. So far in the two months I've been using it I think I was correct about that (that said, when closer to flat the Moonlander's cluster is at a much steeper angle off the rest and is less than ideal)

Also likewise on thinking about a sculpted build, the rabbit hole is deep with these things. Redox Manuform is where I'm currently leaning, I like the extra keys and the thumb cluster looks a bit better. Unfortunately that means going full custom, since while a few vendors sell prebuild Dactyl Manuforms no one seems to do the Redox version.

[tnorthcutt]

IME the Keyboardio Model 01 (sold out but used ones come up for sale, and they're working on a new model) addresses this issue well. Maybe worth looking into.