We all know this was planned or worked on at some point, so why didn't we get it?
My theory - legal liability. The music industry has changed a lot in the past couple of decades. Today, no responsible music label would release something with heavy use of samples without knowing exactly where they came from and getting permission for every single one before release. I can guarantee you every sample on Inferno has had its source documented, and been vetted and cleared. Anything else would be irresponsible.
The old tunes era music is full of samples. I have little doubt there is stuff buried in there that even M&M don't recall where it came from. No legal department would sign off on releasing this music if there was the slightest chance it could come back on them via a legal claim by a rights holder. Look up what the Rolling Stones have done to Richard Ashcroft (Bittersweet Symphony) and Carter USM (and that was literally for the use of three words!).
Even for the samples that have known sources, there would be a huge financial and legal burden in even determining *if* they require permission to use. Then you have to identify and trace the rights holders, and get their permission to use the material in the first place. Then there is negotiating fees or royalties. And this would be for samples which have *already been used*, and so cannot be easily removed or replaced. So essentially being held over a barrel - the rights holders could name their price.
All in all, I think it was just decided it was not worth it financially or legally.
Post MHTRTC and Geogaddi era stuff, i would expect these aspects would not be as much of an issue, so maybe we see some of that in the future, but anything prior to that forget about it. I'm glad we have the recent new Old Tunes tape rips, and hopefully *if* there is more existing music from this time period (which i actually doubt - i think this is most of it), maybe it makes its way out somehow in the future. But i would not hold my breath.


