@JoHud: What was the quality of the two transfers for the Cantor titles in the Hollywood Musicals Box?
Whoopee! looks excellent with a near pristine two-tone technicolor transfer of the film. Appears to have been slated as the more recent release of the two. One odd thing is that there's a bit of overscan on the left side of the screen during the opening credits sequence.
Kid Millions looks like an older transfer. It's still pretty good, but its Technicolor sequence does not look as sharp as Whoopee!'s transfer, which looks like a full restoration in comparison. Unlike the latter DVD, this DVD has a "previews" extra that includes a trailer for the 2-disc West Side Story Collection, which indicates that Kid Millions was on MGM's shelf since 2003 until it snuck out on the musicals set 5 years later
Of those movies that previously appeared on Laserdisc, most of them look and sound much better on the Laser. (especially "High Flyers" which is like chalk and cheese)
What happened to the quality masters or source material they used for the Laserdiscs?
This is one case of the Laserdisc being better than the DVD.
I'm thinking this may be a combination of the film elements degrading over time possibly requiring the use of secondary elements and WAC's recent unwillingness to reuse older analog video masters for new releases. I thought the set was overall pretty good in terms of transfers, but I had never seen the laserdiscs. I appreciate the heads-up for the laserdisc owners nonetheless.