Isn’t delta-9 the THC that most people think of wrt marijuana? If so, my experience ranged from barely feeling anything, to a mild pleasant high, to so intense it was unpleasant. (In the last instance I was impatient, didn’t feel the effects quick enough and took more.)
I was under the impression that the rise in federal legal sale of delta-9 edibles was because the farm bill allows concentrations of 0.3% by weight – so in edible form you can make the gummy or whatever big enough to still include a decent dose.