@Cdaked Hi! I think your mistaking the original sensor devices made by HTC and utilized on the Vive headset vs the TS3633-CM1 witch are used in the Vive tracker (1.0 protocol also) the TS36633 module are about 6$ each in large QTY and the new 2.0 protocol the TS4231 6.5$ in large QTY. The TS3633-CM1 are really better and cheaper than the Vive original sensor designs. And yes the TS4231 are also better because it support the 2.0 Valve tracking protocol.
in short no reason to use the TS36633 for new design about the same price, and the little more you pay on the sensors you will save on the lighthouses