Why I can’t use OptiFine for Minecraft 1.16.1 (rulers for speedrun 1.16+ say that)? If I really can’t use it, okey, why Sodium is allowed?

Not another one of these threads. Why can’t people just look at the bloody forums to see if people have asked this question before?

sigh anyways, optifine is banned because it messes with mob spawns and allows people to mess with game mechanics in a non-vanilla way. The same problems don’t exist with Sodium.

The reason why it’s banned for 1.16+ and not earlier versions is because FPS-boosting alternatives don’t exist for pre-1.16. Sodium is only available for 1.16. If there were alternatives to optifine for earlier versions, optifine would be banned there too.