Optimus and other keyboards with screens under keys

This post is going to be a bit different than most, but I have a hand disability, so I can only type with 2 fingers, and while looking at the keyboard.

Besides dictation, there is little on the market for this. For years, I have been looking for a keyboard with screens on the keys to help.

After getting tired of years worth of delays for the Flux keyboard, and the Centerpiece missing the mark, I decided to just get a used Optimus keyboard. I'm not sure how many are left in the wild since both models were discontinued over a decade ago. Ebay has been averaging roughly 2 sales per year.

Does anyone here have one? Either the Maximus or the Popularis? Or something else entirely? I was hoping to find at least some kind of thread or small subreddit somewhere but I haven't found anything recent.

Also, I have a feeling this post will end up indexed well on Google, so if you're reading this in 2027 and beyond, feel free to reply, I'm likely still around.