@theaudioamp Hard to say, amongst my vinyl collection are hot stampers, can imagine many more very early generation masters as vast majority of 3.5K vinyl collection is from the era it was first released in. I'm thinking most of difference I hear between old and new vinyl is from both differences in recording studios and mastering chain. I have a ton of 50's and 60's recordings, tube recording studio equipment, very little multi tracking. this sounds very different from late 60's into 80's vinyl, multi tracking, ss recording equipment. The much later vinyl I own does improve on most of the late 60's thru 80's vinyl, for the reasons you stated above. The earlier stuff I prefer on early vinyl, I like the warmth, resonance, natural qualities of those recordings, specifically on vinyl. I'm not going to complain about how digital does these recordings either, sound great as well. For most recordings late 60's on up, in order of preference, best being last, old vinyl, new vinyl, digital streaming. Keep in mind these are my individual preferences played back on my individual vinyl and streaming systems.
For me, in general, these late 60's-80's recordings benefit from remastering and being played back via digital, I'm sure this has much to do with superiority of my steaming vs vinyl setups, but I also believe much of the remastering is done with digital playback in mind. I assume past 1980's recordings all being done digitally.