[cyrano]

Besides Thesycon, there at least two other 3rd party developers involved. Thesycon is just the name that pops up because they also sell a universal driver for a lot of interfaces.

There are few interface manufacturers that do their own driver development, but the others don't all shop with Thesycon every time.

There also must be a reason RME chose to emulate their own USB hardware in FPGA. Every one else uses off-the-shelf USB chipsets. It isn't an easy choice as you have to deal with a myriad of different USB ports.

IIRC, there's even a cheap USB chipset around that's simply not suitable for audio or video. Fortunately, it surfaces mostly in cheap Android tablets.

All that is the hardware side. But some* say Thesycon drivers suck. AFAICT they don't suck any worse than most other drivers out there. Compare with printer drivers if you want. Besides, if you're playing with this stuff long enough, you'll realise there are other parameters, like temperature...

* mainly on gearslutz, IIRC.