I started to get pain in my forearms when learning to touch type, after almost two decades of two finger, hen peck typing 😳

After using a Microsoft Ergonomic keyboard I noticed a massive improvement, within a short space of time, in that forearm pain was eliminated and negative tilt was just unquestionably comfortable. I complimented this gradually with retraining muscle memory for Colemak-DH (functional layout), and correcting my desk height and chair height for correct posture.

The Microsoft Ergonomic keyboard has been "quietly retired" in favour of split bodied, programmable, ergonomic mechanical keyboards that further increase ergonomics and continue to prevent pain in my forearms.

Suffice to say I'll never go back to a "slab" keyboard nor positive tilting. It's perplexing to me and an oversight by the peripheral industry that truly ergonomic design for Human Input Devices (term encompasses keyboards and pointing devices) hasn't become mainstream or standardised, given the medical benefits and general sensibility 🤷‍♂️