>>280198169
I think it's because they're scared of making openVR drivers that work with team tracking 2.0. 
there are SOME companies doing that though. 
It's also currently hard to get a hold of triad semiconductor photodiaode stock in bulk, valve, pimax, logitech and htc have bought them all up recently. 
Trackstrap would be smart to partner with vrchat and co-release branded tracking, in my opinion. 
Anyway: nolo, pimax, riftcat, alvr, logitech, htc, microsoft and oculus and a few other smaller chinese and other companies have all written native OpenVR drivers without bullshit like openvr input emulator.
It's not super EASY to code this stuff so people give up. Input emulator made it easy but it sucks. Valve doesn't give very detailed examples for steamvr skeletal tracking 2.0
That being said making your own lighthouse base stations aren't too hard either, but it's expensive and requires precision engineering.