That's nonsense nearly all PSVR games on the launch of the pro had pro support or within a few months. The boost mode makes very little difference and didn't come along until much later. No PSVR games at launch had framerate issues, those that got pro patched usually went from 60fps to 90fps and usually a rendering upgrade or resolution bump.
Hey, I'm just speaking from my experience which is admittedly not quite as extensive as it could be as I stopped using my PSVR regularly sometime after the Psychonauts VR game came out (I feel like there was a bit of a game drought before and after that game launched). Also, you (and looking at a list) helped jog my memory on some of this stuff. So I guess the reason I didn't remember many PSVR games having Pro support is because I dislike the bulk of the Pro enabled PSVR titles or because they were multiplayer focused games that I knew would almost immediately become ghost towns and thus I just played demos skipped buying those games.
The games that are IMO both good and have substantial Pro support are: Dirt Rally, Eagle Flight, Rez Infinite, Robinson: The Journey, Thumper, TrackMania Turbo (120fps) and what I was thinking of with Boost mode is PSVR Worlds which got a huge bump from Boost mode but then the Pro patch it got was kind of a mixed bag. Also, I've definitely played way more Pro enabled PSVR games than the ones mentioned above but they were often bad games (like Arizona Sunshine) or have bad VR support (like Bound) or were multiplayer focused games (like Battlezone) or the Pro support did little to the game (Until Dawn: Rush of Blood). So my point was definitely flawed but after being called out I wanted to explain my train of (flawed) logic.
Two cameras - twice the camera data to process, you'd need to two PS4's working together on that and only new or updated games made compatible with such a rare setup.
The HMD internals have probably been revised to reduce the number of parts and build complexity too.
Yeah, I assumed that two cameras would probably be too much for even the Pro but it's a shame that probably nothing can be done to improve tracking. To be fair, the tracking could certainly be worse (oddly the quality of the tracking can seemingly fluctuate pretty wildly from game to game) but I just wish that it was just a tiny bit better and more consistent than it is. Again, with all that said anyone interested in VR should get this because even with its shortcomings PSVR has some really cool games that do a great job of showing off the best stuff about VR