No... my AD&D "core rules" are all the black border books (minus Council of Wyrms) plus Oriental Adventures; I love the idea of psionics in D&D, but I'm not a fan of the 2e rules.For 2e however, the Complete Handbook series wasn't just a collection of optional rules. There were standalones meant to be part of the core game. So that begs the question, do you consider the Complete Handbooks as part of the core game, or an optional expansion? Do you only consider some of them core, like the Fighter's Handbook, while others optional, like the Psionics handbook (by the way, my favorite version of psionics in the game)?
I use the hell out of the PHBRs when I run AD&D, but not as-written. Pretty well understood that some Kits are more like 5e Backgrounds and some Kits are more like Pathfinder Archetypes; I replace the Fighter and Thief with narrower classes based on the Handbook Kits, and the Cleric and Mage with Specialty Priests and Specialist Mages and incorporate some of the Handbook Kits into those. Then, instead of using Kits... all of those narrower classes get bonus proficiencies.
It sounds like a huge, horrible pain in the ass, but it's actually pretty elegant when you have all the classes laid out already and you just have to pick your whitelist for the campaign.







