You've got a fine argument for preferring GPL software, but I'd be shocked if there was a ZMK keyboard out there you couldn't flash.
a.) That's how you configure it
b.) Upstream (including the platforn, Zepher) is moving quickly, with frequent performance, feature, security, battery life, and usability improvements-- eg. a recent commit touts support for bitlocker screens
c.) I had to hack on it to get the behavior I wanted, which.. oh, that means a company might want to hack on it too, i see
but this all to say that it would be a remarkable tragady for a company to not support mainline provide you with the sources, if just for integrating upstream updates, and thankfully I can't think of a product that does so. I'd prefer it was copyleft too (so we didn't have to worry about it), but I wouldn't go so far as to proclaim that's what "you're getting" as if it's endemic to the platform.
