Nearly all the DIY keyboards I've seen are ruthlessly minimalistic and I really would prefer a larger keyboard with more keys, so I don't have to remember lots of meta-key combination short-cuts. I don't think I've memorised all the keyboard short cuts in a given piece of software in a decade... I just don't really use one particular thing enough to make it worthwhile.
That keyboard with the active LED keycaps came out in what... 2006? I expected a regular keyboard with small set of active keycaps for macro keys would have existed by now. Come to think of it, I never used an Apple laptop with that active TouchBar thing either but that doesn't seem to have achieved enduring popularity. but I guess there's no real market for that either.