Back in 1973 I managed to climb a C150 Aerobat (130hp) to 15500'. The view was fantastic. I was 18 years old and fit.
Of course it was long before the PPL had human factors included so I stupidly chose to spin down to 10,000 and promptly greyed out in the recovery!
I sheepishly landed back at Ipswich very much wiser than when I'd taken off.
Now I will happily operate the Archer up to FL100 if needed but would not want to be up there for the full endurance of the aircraft.