I've found frame rates tanking on my SSD, 1080Ti, 6700k @ 4.5Ghz and 16GB of DDR ram system since the release of 3.0 earlier this year. Frame rates in around stations are poor at times with ASW kicking in and out making the game a jerky mess, opening the station menu sees my frame rate plunge through the floor randomly. RE Sites are just not worth visiting anymore as ships jitter past your cockpit and using the SRV with friends is a frame rate death sentence.
My settings are conversative for my rig with SS only set to 1.3 and most of the of the other settings on high or medium with the usual suspects disabled, I used the same settings when I first got my 1080Ti but with SS @ 1.5 and was happy with the performance I got. Then 3.0 dropped and it all went down hill. I've lowered every setting and turned set SS to 1.0 for testing purposes and those same areas in the game have the same frame rate issues no matter what settings are used.
During the 3.0 beta I could switch back to the live version of the game and have great performance then switch back to the 3.0 beta and see my frames tank. I could do this at every stage of the beta, it was repeatable. During every stage of the beta I reported this issue, durring every stage of the beta the bug report was ignored and closed.
I've seen others raise the very same problem, I've seen the QA team each and every time reply with the same generic nonsence acting as if the problem has never been reported to them before (which it has been - many, many times), the stall of asking for logs which show nothing of any use and the same generic reply saying that the problem cannot be reproduced in house and the bug report closed. I even pressed the issue and asked if they were able to test using an older pre 3.0 version of the game and to then compare the frame rates to those in the current version. No reply was ever recieved and the bug report thread was once again closed.
Mike, I'm in the same position as yourself and do not play this game nearly half as much as I used to as in it's current form it's a mess. In my opinion FDEV have pretty much abandoned VR, the fact that the game shows on your headset is all that matters, how well it continues to run is not something they give two hoots about.