Data point. Old fart who switched to Dvorak eons ago, at age 16. It felt natural after 1 week, and felt more efficient than the ‘qwert sometime between weeks 2 and 3. I suspect young age greatly affects take-up speed. Good on ya for taking care of yourself, and switching when you did.

Incidentally, at age 26, I used the “left-handed” Dvorak layout for 2 weeks while my right wrist and hand healed from a dirtbike crash. I was only becoming proficient at the 2 week mark.

The Dvorak left- and right-hand layouts are not as widely known, and look nothing like the standard two-hand layout… but are incredibly optimized. Even the number row is remapped to accommodate letters. Once I started to grok its efficiency, it felt like 10-key’ing entire words at a time. Might be interesting on modern phones.

I experience the same thing with QWERTY and tendons in wrist & forearm. I have to slow down - a lot - and take breaks. I just remap teh kbd if > 15 minutes. iOS kbd keeps my brain familiar with QWERTY; no first-party Dvorak and I don’t expect Apple to ever include one.