2E's Psionics are much simpler, much more elegant (essentially like general skills), but using power points and skill rolls to see if they triggered. Aside from the range of available abilities, and who can get them, it's almost nothing at all like the OD&D Sup III nor AD&D 1E psionics.
3E's was very much weak sauce - being essentially vancian with a different source and list. And man, the list overlapped. A lot. 5E has almost totally lost the distinctions mechanically.
I thought I remembered 3e era psionics still using power points. Am I completely confused here?