Professional tape machines suffer in modern comparisons because they're all at least 25 years old, with technology and electronics that are even older. Whether multi-track or 2-track mixdown, most of the mechanical parts are worn-out and unavailable, the electronics are also worn-out and old-school parts and circuit designs. Few remember how to maintain and calibrate (daily) the studio decks. Finding decent tape is a challenge. I'm sure only a handful of studios worldwide have an analog recording chain that's working as well as it was in 1980. And what artist wants to pay the far greater price to record true analog?
I sure wish it were otherwise, as I'm sure if analog studio gear had kept pace with everything else the past few decades, the choice of all-digital for ease of recording, near-zero cost, and improving-yearly sonics wouldn't be quite as stark. Ironically, when I see a current album was recorded AAA, I'm concerned about the health of the entire analog signal chain and their intentions when the best digital gear can make recordings that will exceed worn-out analog recorders and signal chains :-(
I've seen the recent revival of prosumer (and pro) 2-track R2R for the ultimate in home playback, but most of them are fully redesigned (playback) electronics and rebuilt or remachined mechanicals. And I'm never sure how and from where they're sourcing their not-inexpensive tapes...
