This is not directed at anyone or any specific comment.
The reality is that these quadio releases are sitting on a shelf almost ready to go. They are low hanging fruit that can be plucked, shined up, and put out to market with very little up front investment. Acquiring the rights, having to take the original masters and create something new from them requires a lot more up front investment.
I have no idea what the profit margin per disc is or how many quadio discs are being sold, but I'd assume it relatively low given that most physical disc sales are low across the board. The point being, that if the up front costs are too high then the profit margin shrinks even more, and no company is going to go through the exercise if they aren't going to have a worthwhile return.
The people that green light projects like this aren't doing it to make us happy, they are doing it to turn a profit and that profit has to be worth the effort. If they were to take on a new project from scratch then it most likely would have to be an album that was multi-platinum. I think the best thing we can do to support this process is buy those recent releases: Fleetwood Mac, The Doors, Alanis Morresette and Hootie, more so than the quadios.