Point taken, but I still don't want to buy the Mosaic just to find out the music doesn't really speak to me. I think even the recent 4 CD set might be too much.
I am a bit more interested in the John Carter Select. I do have Castles of Ghana and a few others, but I still don't reach for them that often. I am trying to re-prioritize and maybe having hundreds of CDs on the shelves that I never listen to isn't the way I should play out the second half of my life. I have one bookcase of the most important CDs (maybe 300) and I could sell all the rest off and probably never notice the difference. I've been thinking about that a lot lately, especially as the second hand CD market looks set to collapse as well.
Please try one of the Threadgills on About Time before you toss him in the dust bin.