In which case, WotC would have no interest in such a product. That group too tiny to cover production costs. And also so divided that whatever approach WotC took at lease half of those people would hate it anyway
Exactly.
A good psionics system would not tell well enough for WOTC in a standalone product or a primary feature. There are too many choices and the community is too divided.
Only a simple, watered down, and nonlore version could.
That's why if they were gonna hide Psionics in TCOE, they should have bit the bullet and remade the 1e, 2e, 3e, or 4e Psionics because lt wouldn't have hurt sales anyway.
No one would say "I'm not buying TCOE because it has 2e Psionics".
5e Dark Sun will use Psionic spells.Dark Sun psionics will look exactly like this. Dark Sun is the whole reason WotC are bothering with psionics at all.
My point is Tasha is debuting Psionics not Dark Sun. Psionics could drag down a Dark Sun book. Debuting it in Tasha softens the blow.
The Dark Sun book can now focus on lore, Defilers, Preservers, elemental clerics, and DS races.