It's true that hundreds of programmable keyboards we use today are supported by QMK, but based on the parent comment's 4 years at Massdrop, it seems likely that

It's true that hundreds of programmable keyboards we use today are supported by QMK, but based on the parent comment's 4 years at Massdrop, it seems likely that a lot of the programmable keyboards they are referring to are ones that didn't support QMK or even TMK out-of-the-box.