Anyone buys master tape dubs ?

No chance. There is so much information on tape, espacially in the top end. The different instruments are so extremely separated. If the recording on tape has a good quality, it is an other world.
But i have to say. If you digitize it with a very good ad-converter, you will hear less to no different. Hard to say. I cannot explain this for me. I think tape has it´s own sound.

I have about 100 albums on 15IPS tape - mostly original production/distribution masters from CBS & Jugoton plus a few from Tape Project.
I archive them onto new RTM tape stock (either SM900 or LPR90) with Dolby SR, as well as a digital archive using a Prism Sound Lyra 2 A2D interface. The digital copy owing the Lyra 2 is pretty much indistinguishable from the original tape.

How do you store and playback digital copies ?
It is interesting that AD plus DA conversions maintain about the same sound quality. I would think that something would be lost, not to mention noise.

some of us run all three and can discern the relative strengths and weaknesses. High speed tape is fantastic, so is a world class A2D and DAC, or a great LP system.... music lovers will chase more than one I think, out of necessity and of course rewarding the artist...

have fun, do upgrade those deck electronics and do level match between sources, some people just like the gain juice.....and don’t know why.....

If someone is interested in exchanging tape´s, let me know.