I have heard that weed from the 70s era only had ~2% THC where now at least dispensary grade can hit 20% to 25% THC. That could well be due to the drug war selecting for more powerful highs in smaller packages, but i would think that would also reduce the quantity needed to get the high you want.
No. I smoke more than ever. Smoked for 20 years but it’s the best way I’ve found to numb myself and it keeps me off the Xanz.