Ditto. I have a Sony UHP-H1 as an SACD player, so it's probably not comparable to a stack of separates from dCS or EMM Labs 💸
There have been very few pop/rock albums that were recorded for hi-res from the beginning - the few recordings were usually converted from old masters.
I have a few jazz and classical SACDs, but most of them were also from old sources (1950s-60s) so it's hard to say whether the better sound quality comes from the format or the number of times the masters have been fixed and edited.
In general, I get the impression it would take a knockout recording and an extremely expensive chain of equipment to notice the difference - also, I think people underestimate how good CD quality can sound on modern equipment.
In the early days of hi-res, I think much of the novelty came from the new multi-channel mixes (like 5.1 or more), rather than the actual quality improvement on a stereo recording. And don't get me started on HDCD...
Personally, I'd still rather buy CDs and SACDs than invest in a high-res digital streaming or files library setup.