I write code for videogames!
People and companies occasionally come back to the idea - there’s the recent Flux, Elgato’s macropad (and its numerous imitators), and who was it that was showing off a keyboard with mini-screens while using Dota 2 skill icons as an example
Another way to tackle this problem would be to have a little projector (maybe laser, ideally not) next to the keyboard to shine the labels onto the keys
I think that did materialize, but was rather underwhelming?
As far as options for replicating the layout go, I think ErgoArrows would be the closest - you can get it as a kit.
If it’s more about the middle keys than the a bunch extra keys on the bottom, there are many keyboards like that - Ergodox/derivatives, Kinesis Advantage360, Moonlander, Redox, Dygma Defy, and Keyboardio Model 100 all have 2-3 keys in the middle and can be bought pre-built. ErgoDash, Ergo68, and Pinky4 can be bought as a kit.
“Key spacing” is usually the term.
I think Dao Choc BLE, city42, or the various Hillside keyboards would be the closest that you can get pre-built.
The keycaps are a part of this keyboard’s cost (Keebio prices a similar set that comes with Cepstrum at $52), though it’s not easy to find choc-spaced keycaps for cheap unless you 3d-print them.
The primary drivers for the cost are likely the R&D work behind the keyboard and that it’s a keywell (with more complicated assembly process).
Perhaps you could get a used one - IIRC there was a channel on MoErgo’s discord.
If you mean the thing for strafing, there was a QMK pull request, though this is now being hastily banned from just about every competitive game. If you mean hall effect switches, I’m not aware of any keywell keyboards with them - there’s just a single 58-key (Lucca 58-HE) as far as column-staggered boards go.