I had some strange behaviour with Steam and the survey. I've owned three AMD GPUs in a row: Rx480, Vega 64 then 6800XT. None of those GPUs triggered a Steam survey, two were new system builds. A friend was having what they thought was a performance issue with a 2070 using something like a 2600 (can't remember the exact CPU) so I offered to test on my machine as I was running a 3700X.
DDU, installed the new card, installed drivers, launch Steam and the survey triggers!
Now, I believe this is purely co-incidence, or DDU could have been a trigger (though didn't happen when I DDU'ed again and put the 6800XT back in) but I would be interested to know what the criteria is for triggering a Steam Hardware Survey,
I'm also on my second VR headset, neither of which will have been captured in the survey.