Judging by studies on long term use of other mind-altering drugs, I would expect psilocybin to similarly cause decline in cognitive abilities after prolonged use.
Unfortunately (or maybe fortunately), I could not find studies on effect of specifically psilocybin on cognitive abilities.
And please, don't bring up EmoIQ and other non-reasoning related stuff. This is not what the concern is about.
If anything shrooms would be contributing to neurogenesis[0] not destroying brain cells. Opposite to alcohol which is well known to destroy brain cells.
Unfortunately (or maybe fortunately), I could not find studies on effect of specifically psilocybin on cognitive abilities.
And please, don't bring up EmoIQ and other non-reasoning related stuff. This is not what the concern is about.