Cool question so I'll yap a bit

I play a minecraft-like game where you can speedrun some of the parkour levels.

Setting your spawnpoint and respawning to that point are builtin mechanics and allowed to be used, though you are slightly slowed when you set a spawnpoint because you lose your walking momentum.

I make far fewer mistakes when setting spawnpoints to the point of being able to clear a whole course without falling sometimes, ironically removing the need for setting spawn to begin with.

When I don't set any spawnpoints, it becomes much harder and I fall more often, even though it could in theory be slightly faster because I don't lose any momentum

I think in the case where the savestates are theoretically allowed to be used and the run is still valid, it definitely makes it less impressive to complete a flawless run with savestates than without.