Earlier quoted context omitted.
Interesting to me you say this, as my main criticism of most ergo / split keyboards is they don't have enough keys on the thumb. I started with a Maltron [1] with 8 keys on the thumb and that seems a good arrangement to me. [1]: https://www.maltron.com/store/p11/Maltron_L89_dual_hand_full...
Interesting to see a Maltron user in the wild! What made to buy one, and what's your take on them? (say, compared to Kinesis Advantage?)
I haven't used a Kinesis, so can't compare to it (though Kinesis is supposed to have copied their design, so I guess it's very similar.)