I previously posted on switching from the Kinesis Advantage 2 to the Text Blade. In that case, I was going from a keyboard that I had used for 15 years to the Text Blade. I documented some of the changes I experienced.
Due to my Text Blade taking a short, unplanned dunking, I had to switch back to my Kinesis for a few hours after 4.5 months on the Text Blade.
One issue I have with the Text Blade is in casual typing. This is where my hands aren't resting on the keyboard and i then have a need to type a few words. i try to wing it and don't first home my fingers and straighten everything up. I have variable success. What surprised me is that when I went back to the Kinesis, I had the same issue. I had thought that I was able to casual type on the Kinesis, and maybe i was better at it before I went to the TB. Presuming that I was better, then it would be a learned skill, and I guess I will get better at being casual with the TB.
The other thing that surprised me was the amount of movement my hands made while using the Kinesis. I bought it years ago to reduce repetitive stress issues. It uses two bowls to keep all the keys the same distance from fingers. It also moves a few keys from pinky to thumb. It did remove any RSI issues, and that's why I used it for so long. I didn't notice how much finger movement there was as I never had anything like the TB to compare it to. And a key part of this movement is going to the number keys.
I learned a lot in the few hours of switching back to the Kinesis. My memory could only be as good as my experience. And even though the Kinesis served me well, I have no interest in moving back to it now that I've experienced the TB.
Fortunately, after a few hours, my TB was quite usable and the Kinesis is sitting back on it's nearby shelf.