But, that's the thing RotGrub. No, the lore didn't return. Since when were kobolds slaves to dragons? Since when were salamanders slaves to Efreeti? I'd forgotten the curse part of minotaurs in 2e to be honest. It was dropped in 3e and didn't appear in 1e.
Like I said, the irony is just palpable. You like the 5e Monster Manual, so, all the lore changes are great. However, psionics is something you really care about, so, the lore must follow whatever you like, otherwise, psionics just isn't psionics for you.
For me, I couldn't care less about earlier edition lore. Never could. A minor, throw away line about tying psionics to the Far Realms is a whole lot less intrusive than many of the monster entries in the Monster Manual, so, AFAIK, I simply don't care.
But it is fun watching those who do care squirm.