Do any still use an older high end tuner from the past?....

I got lucky and located a NOS McIntosh MR-67 FM tuner.  I restored the power supply -- up-graded the discriminator, Multiplex board, and audio section with parts such as stacked-film polycarbonate capacitors, Teflon capacitors, and modern Roderstein metal-film resistors, and the like.  The sound I have been getting from this vintage yet text-book FM tuner is as good as the FM station broadcasting.  I mean that in some cases it is as good as a good CD.  Before that I had a Magnum Dynalab Tuner -- that by direct comparison with the MR-67 was, in my opinion, a piece of junk.  The MR-67 design followed the established standards of the original FM stereo patents.  NICE!!!

"I got lucky and located a NOS McIntosh MR-67 FM tuner."
Talk about lucky...excellent score. NEVER seen a listing for a NOS Mac tubed tuner.

My 1965 MR71 has been seeing overtime lately. If one can't have a Marantz 10B or the rare REL,  a Mac or Scott are probably the "best" tubed units still available.

I had a McIntosh MR 7082 tuner for about 30 years but I did not care for it requiring batteries to store frequencies and the difficulty with the frequency display. I fixed it up and sold it cheap to someone who could completely rebuild it and replaced it with a Magnum Dynalab Ft 101. I put up three directional FM antennas with RCA RF preamplifiers on towers and connected these to an antenna selector switch for each of the concert music stations in distant cities. This combination gives me the best sensitivity in most weather conditions I can afford. 

I'm listening to a Nakamichi ST-7 in my basement system. Not really high-end but it still sounds really good with the only NPR/classical  stations that are worth listening to in my area (WGUC and WVXU). Using a really cheap wire dipole on the wall I get 4 out of 4 bars on the strength display. Upstairs the built-in tuner of my Marantz 8805 prepro is surprisingly good hooked up to my attic space FM dipole. The advantage of the Marantz is that I can get internet radio, and so of course there is a huge choice there. SQ of internet radio is very spotty, but the BBC and Classic FM feeds sound quite good. In any case both of my FM options sound better than a Marantz ST59 tuner I bought in the late 90s to feed my Sony preamp back then.

I have owned many tuners over the years, but my favorites are my present three:  Mac MR71 and Marantz 10B, both recently refurbished by Richard Modafferi, who did an amazing job.  (When he opened up my MR71, he discovered that he had performed work on it in 2000, some years before I owned it!)  I also use an MR78 that I purchased slightly second-hand in 1978.  It has had only a light tune-up to replace some lights, etc., in all that time, and it still sounds amazing.  These are great units that provide spectacular sound reproduction; I haven't found anything with today's technology that compares.