Jason Corley yep old D&D out of the LBBs is a hash of stuff. For being so unreflective, it’s fun for many. Because hash can be delicious. I’m actually more of the opinion that thale game presented in seventies d&d base game was mostly about a hash of magic, monsters, dungeons.
As for Greyhawk and Blackmoor and Tekumel, if one can get past the fact that they are literally the first examples of their type (literally as in pertaining to written matter) so badly developed by current standards, they do shine in specific areas.
And by badly developed, I mean that the handbooks are organized like shit.