I've been saying it alot over the past several years.
Looking through my PDF of AS&SH this morning, I actually said it to myself under my breath.
There certainly was a gigantic pile of dogcrap through early D20/3.X's life, but these days there is so much good new stuff available. Other than Phandelver, I have only used 3rd party (including PF) or earlier edition materials converted for my 5E sessions.
So yeah, thanks OGL, and Ryan Dancey and all those involved making it happen way back when.