In my experience yes. I’m almost 40 and hungovers are brutal now even though i’m drinking less.

Yes and no. For me I’ve basically eliminated them, but that’s due to planning. Always take mega doses of b vitamins & tons of water, basically no hangover.

Also, when I do drink it’s much higher quality stuff than when I was in my 20s, and all neat whiskey now. So no sugars, and less low-quality alcohol (contains esters & fusel alcohols in higher concentrations) which make it worse.