Heck, Rolemaster did a spell point system too, as did D&D's 2E player's option books. Point-based systems been around for a while, they're just generally not accepted as "D&D" for some reason.Runequest offered a brilliantly flexible, interesting, tactically nuanced magic system which didn't overshadow martial characters or relegate the usefulness of skills in 1977.
I'm astonished at the claims being levelled at magic point systems in 2022, and the willingness to make them without evidence of any kind, but while demanding evidence to the contrary. Standard hypocrisy.
And it isn't just the magic system - a psionic system that uses a point-based system just seems to go against the 5E designer's design specs for some reason. It's all rather bizarre, like the designers have a phobia of keeping track of anything past 4 of something.