Just with what I've purchased alone that's 20 books owned and another 6 on the way. This doesn't even count the PDF sampling, of which I have maybe a dozen more so far.
Just sayin'......WotC maybe ought to have put out an OGL after all, hmmm? Although....I consider it very interesting that there was a quote...which hell if I can find it now, from Wolfgang Baur I believe, that suggested that on a certain level WotC was grateful for the big 3PP stepping in to fill some of the needs of fans out there with these products. I'll keep searching to see if I can find it....on ENWorld iirc.
This calls for a mosaic!
....Yeah it's been a tough year for D&D 5E fans.