Yaarel
🇮🇱 🇺🇦 He-Mage
Psionics have been part of D&D since even before 1e.
Eldritch Wizardry, the same Original D&D booklet that introduced the Druid also introduced psionics.
Originally, psionics was more like psionic feats (compare 5e Tashas psionic feats), but each edition reinvented new mechanics for psionics.
My favorite is the 3e Psion, which is pretty much a fullcaster using normal innate spellcasting. Its 3e spell points were better than 3e vancian prepared slots, but I consider 5e spontaneous slots better than the 3e spell points. For psionic themes, 3e referred to spell points as "power points".
Eldritch Wizardry, the same Original D&D booklet that introduced the Druid also introduced psionics.
Originally, psionics was more like psionic feats (compare 5e Tashas psionic feats), but each edition reinvented new mechanics for psionics.
My favorite is the 3e Psion, which is pretty much a fullcaster using normal innate spellcasting. Its 3e spell points were better than 3e vancian prepared slots, but I consider 5e spontaneous slots better than the 3e spell points. For psionic themes, 3e referred to spell points as "power points".