Apparently, there was an issue with my last messages about this for some people, so here's the idea again:

We could generalize Control.Exception.evaluate to

evaluate :: PrimMonad m => a -> m a
evaluate a = primitive (\s -> seq# a s)

and then export it from Control.Monad.Primitive as well, which seems to me a much more natural place for it. The only challenge is that the PrimMonad class would need to be moved to base.