Chaosmancer
Legend
I'm still not sure that this conversation matters for the purposes of answering this genre question. If we want to discuss whether psionics in D&D is magic, then this just goes back to what @DEFCON 1 said: it depends on what is meant by magic.
It's odd to me, for example, that divine "magic" constitutes magic considering that there is a long pattern in history of saying that supernatural effects performed by the faithful are "miracles" and explicitly not magical, since "magic" is something performed by the non-faithful, charlatans, pagans, etc. But by D&D standards, the "magic" of wizards and the "miracles" of clerics are one and the same: magic.
This might skirt the edge, but this reminds me of something I learned years ago.
The Bible has a line in it, about "not suffering a witch to live" which is in large part why 'magic' is the realm of the "non-faithful". But that is actually a poor translation. The original word in Hebrew has a different connotation, instead of "witch" the meaning is more accurately "one who uses magic to harm others"
And that is because the stories of the famous and powerful Rabbis who performed "miracles" were seen as magic by those people. The Golem of Prague was made by inscribing the word for Life upon it, the tradition heavily leans about only Rabbis of certain purity and devotion knowing certain words, because speaking those words were words of power. And they would only allow those of good character who would exercise restrain learning those secrets.
Very tangentially related to the conversation, I just like how DnD is reflecting an much older understanding of what magic is, but combining the multiple practices under a single Aegis.
I don't mind psionics being a form of magic, as per 3e and 4e D&D, BUT this is again where I take issue: the attempt by people to advocate that the wizard subsume all things magical. So I would argue that psionics, psychics, and the "occult" (to borrow the Pathfinder 2 term) do have a sufficiently different set of class fantasy and aesthetics from the wizard, warlock, and sorcerer to justify its own identity as a class or form of magic (e.g., divine, arcane, etc.). I would also say that this form of magic may even have its own advantages (and disadvantages) and that a lack of material components would be part of that, since that fits the aesthetics. I did like the earlier suggested idea that a Psion gradually learns to remove the need of the various spell components or can play with concentration mechanics for their spells/powers, but that it's not necessarily automatic.
I don't mind a Psion class. I think it will have to work a little to be different from an Enchanter Wizard with the proper spell list, but I am interested in seeing how they would accomplish that.
My favorite idea so far has been adopting the structures of the Warlock into the Psion Class, since having something similar to invocations feels right mechanically.