I guess you didn't touch LSD? I think 12 would be considered short :)

I knew personally someone whose trips usually took 48 hours. Unusually long, yes, and really exhausting.

LSD had the same duration with me, but more psychological & emotional impact. So I avoided it for two reasons. Weirdly, all my divorced 50+ year-old male peers are now into K and DMT. They are raving about DMT, but I feel like my brain is too frail-as-is.