Unfortunately, it wouldn't have been possible to include all of those keys, just due to the sheer size to which the kit would grow, and the associated increase in cost.
I will address a few points:
* Planck keyboard support - the Planck is a 40% matrix design. VERY few people enjoy using a matrix keyboard. So to add support for a keyboard with so few users would unnecessarily add costs for the OVERWHELMING majority of purchasers, while benefiting literally only a handful of users, who may or may not purchase the set. GBs are about economies of scale.
* KBT Pure Pro - a very unfortunate keyboard design. As someone who designs and builds keyboards myself, I can tell you without hesitation that this is one of the worst keyboard designs I've ever encountered. If you purchased the Pure Pro, it's my opinion that the folks at Vortex duped you into buying their terrible product, which they dubbed with the "Pure" moniker in order to try and capitalize on a very good previous design. Marketing bait and switch, as it were.
* Other OS support - I did include 1.25-unit keys with SUPER and CMD labels, which covers the vast majority of users. Very few users will need a 1-unit OS key. Also, in the future, I plan on including an OS-agnostic symbol, which will further reduce the size of the kit, by eliminating the WIN, SUPER, and CMD keys altogether. More info on that topic here: https://geekhack.org/index.php?topic=67638.0
Damn, you spotted me on the Planck, I just thought it was selling ok because last PMK GB included a Planck set. The only interest I have in the Planck is that Planck sets may allow me to get a close to Pure Pro set
I could have say the Poincarré or anything that has R3-R4 singles =)
I know this isn't the place but now you started it I wanna know, why is the Pure Pro so terrible?
When I had to choose it came pretty on top, it has arrows, it is plate mounted (sounded like a cool idea at the moment, but not so now that I had to hack it a little and that I realize I'm a light force typer), it has backlight (which also sounded like a bright idea at first and still is in a way), it has 4 keys on the left of the space bar and these 4 lefties are vital for me, it has two additional programmable layers with possible timeout sequences (that I may use and is really fun to play with) and a smaller footprint than the Tex Beetle or the Filco Minila.
Ok it could have been better so I won't have to rely on software for 2 or 3 keys and allow layout flashing but been available and while I didn't know much about Teensy and DIY or Artisan keyboards...
I don't see, what's wrong? The PCB is a Poker one, just as the Pure should be as well, so basically the same.
Mmm oh... keycaps you mean? Right, I thought I won't have to change caps, but then... well, you see, there are these guys which are crazy about keyboards, they make incredible cool keycaps... ;P
Yup seen the universal symbol thread, great idea so with less OS keys you can add more Pure Pro keys for the same price in future sets!