Really enjoying the comments and observations since I got involved with audio starting in the early 70's and worked at a nice audio store during college through 1979. Between manufacture reps coming to the store and going to several Electronic Shows, one source that I wish had been a commercial success was pre-recorded reel-to-reel tapes. Even quarter-track stereo recorded at 7.5 ips with dolby was great, but the medium has much room for improvement with 2-track at 15 ips encoded with dbx. Astonishing sound.
A major difference, as has been brought up as one of the reasons vinyl has a certain sound, is going from tape directly to tape eliminated the need for RIAA equalization. If you've really looked at how extreme the dB range is to compensated for the physical limitations of vinyl, it will surprise you, like me, how those LP's can sound so good.
But even vinyl had room for improvement and I see they are starting to sell them again - LP size records cut at 45 rpm. If they are anything like those from the 70's I heard, well worth the extra money and shorter play time.
Either way, both the turntable and reel-to-reel required your attention and gave you an involved, tactical relationship with a quality piece of equipment that made the listening experience all that much more enjoyable. I feel a bit sorry for the younger listeners that will never get past the convince of hitting a button on their iPhone or portable digital audio player, no matter how good the source is.