I would've loved to have been around for this. I feel like the 90s and early to mid 00s must have been a great time to have been a fan of reissues, Mosaic or otherwise.
Guess they were ... I "joined" around 1996/97 and after a few years felt like I had arrived some six or seven years late (like, nearly all Blue Notes were out on CD around 1988/89 a first time, some never re-appeared afterwards, or for a few weeks in Japan).
The two Vee Jay boxes (Shorter/Morgan and Kelly/Chambers, both six discs) disappeared overnight (as did the Stuff Smith Verve) for reasons never disclosed, as far as I know. Those are wonderful boxes, for sure, and I'm very happy to have them!