Is it possible and beneficial to have a four sensor setup? With the idea that you have more than enough 3.0 USB ports, or the idea that compatability hardware-wise is not an issue. I have 3 sensors now, no issues, plenty of 3.0 usb ports with their own usb hosts. Googling brings up results from 2016/early 2017 talking about Oculus updating to be compatible with 4 sensors but not much of anything more recent. I mean, if you have the hardware to run it, could you run as many sensors as you wanted? When does it become incompatible?
Is it possible and beneficial to have a four sensor setup?........
.........I have 3 sensors now, no issues,.........
I run 4 sensors and no problems, but yea of course - if 3 works for you no point in adding another really. I believe 4 is the "soft" limit at this time, but my understanding there isn't really a "hard" limit for it not work with more.
Anything greater than 4 or more tracking area will mostly need to be to have an addition to the current tracking system. For example, having both the headset and controllers use inside out tracking along with outside in tracking to give you the best of the best tracking. Even still - there are still hard limits even with that, but at that point - what really needs that?
Anyways, go 4 if you really want to have another senor for those times you are not really facing 1 or more sensors (like a od shape play area) like I have.