Being on championship level teams allowed those players to do that.His performances this year look like a more enhanced version of the issues he's already had for the last two years. His game is still there but he's just too damn old to do it night in and night out, so if he has any lingering injury, plays too many minutes, or plays too many games in a row he deteriorates.
Honestly he should probably go on a 2019 Kawhi or 2012-2015 Duncan plan, aim for 55-60 games, try to stay below 35 minutes, and take a lot of breaks, be fresh as possible for the playoffs.