I think you’re overrating his playoff pedigree.
Young was in the playoffs for the 2020-21, 2021-22, and 2022-23 seasons. Let’s compare his playoff per 36 min stats to his regular season stats for that year…
Regular Season
.589 TS%
27.9 PTS
10.2 AST
4.3 TO
Playoffs
.533 TS%
25.2 PTS
8.6 AST
4.2 TO
So his efficiency and assists decrease significantly in the playoffs, but the more interesting thing is his On/Off stats in the playoffs compared to the regular season for those 3 seasons…
Regular Season
Off On/Off = +7.7
Def On/Off = +4.1
Tot On/Off = +3.7
Playoffs
Off On/Off = -0.1
Def On/Off = +2.7
Tot On/Off = -2.8
So during the regular season, his team is actually better with him on the floor (although they are much worse defensively but at least his offense makes up for it). However, his team has actually been better with him off the floor in the playoffs.
Again, I don’t think he’s the playoffs performer you think he is. What I remember is a guy who is easily exploitable in the playoffs and the numbers appear to back that up.