[p0w3n3d]

I would say that Minecraft servers by some qualities are really hard to implement (for example generate world as Java would - using Java's random number generator to generate exactly the same world in Rust) or even impossible. But other usages, like walking through existing world with 1000 of your colleagues might be worth of writing a very fast but not a "drop in replacement" server. Or a massive minigame maybe?

[alex_medvedev]

Hey, There were already efforts made to rewriting the same random generators from Java, And they work. Same seed as in vanilla, Same Result as in vanilla

[Xeamek]

But the world generation is already deterministic with seeds

[IX-103]

It's only deterministic if you feed the seeds into the exact same pseudorandom number generator and fetch random values from it in the exact same order. If you take a single extra random value out of order, then everything ends up different.