I own a fairly large collection of LPs. They sit in a media room which is also full of Beta Tapes, Cassettes, LaserDiscs, DVDs, CDs, and whatever else is in there that I may be leaving out. The LPs are mostly from the late 60's, 70's and 80's when I originally purchased them. I don't believe I've listened to them since the 90's.
I currently have a highish end 7.2.4 Dolby Atmos home theater system (Klipsch, Marantz, NAD) and mostly listen to Hi Rez music streaming services (and the few Hi Rez discs I own) there, or through headphones on my mobile devices, or through Apple CarPlay in my vehicle which has a highish end surround sound system in it.
I hold on to the "old stuff" for sentimental reasons and am not really sure how it will sound on my current system because I don't have the various players hooked up. I'm not sure how they will stack up subjectively to the Hi Rez stuff. Obviously, the visual media will probably suck, but the sound quality of the audio elements will be VERY interesting to compare. For example, the cassettes were recorded at double speed and I have an old BIC double speed cassette deck (tape hiss I know, but I also have a few dolby noise reduction units to clean it up, I have a closet full of unused equipment). Will it sound Hi Rez? Probably not, but I know it is still enjoyable to listen to.
I only purchase Hi Rez recordings now, but will be holding on to all my old stuff for posterity's sake and will eventually listen to and enjoy it again. Thankfully, I live in a large house and warehousing these items isn't an issue.