You did see the clarification that this quad is sourced from q8, right? While that isn't the master tape, my guess is it doesn't feature some of the annoying artifacts of LPs.
Personally I reckon that an old Quad tape or record in the hands of someone like AoQ, Bob Romano, etc who
i.) really knows what they're doing,
ii.) has quality equipment, properly setup
and iii.) has a real talent for it..
..can be a most wonderful thing to behold.
I've always had a lot of time for those people but since I started screwing around with old Quad records myself recently (and learned first hand how long-winded a hassle the whole process can be even to turn out the kind of mediocre stuff I've done) my respect for what they do has gone onto a whole other level.
Their wonderful work preserving those vintage Quads, including those that are missing from the labels' archives like these Rick Wakeman albums but also those Quads, too numerous to mention, that are still not available in a modern-day format, shouldn't be underestimated imho
Edit: I'll add a iv.) to that list of criteria = tapes or discs in the best condition you can find is a must..!
Fwiw I've had to accept old Quad records in the kind of shape i'd never have lived with if just stereo but some of these old Quad records are rather thin on the ground plus not being based in the States has been and continues to be a real pita, many times international shippings been more expensive than the records.!