Comment by Duralias

There are two things holding back mini games and special worlds, inexperience and Udon.

The more technically impressive worlds don't just use the VRChat provided object syncing or interactions, they create their own systems tailored to the world, but Udon, the world scripting language, is sluggishly slow, 200X-1000X slower (according to VRC themselves and I know is true from experience), compared to ordinary scripting inside Unity, which means the only ones able to make their own systems are not only good at coding, they are really good at optimizing, on a generally amateur creation platform like VRC those people are very few.

They are trying to recreate Udon to be more performant, but small company and their first attempt was discarded after the sole employee working on it was let go.

Network delay could be considered another thing holding back mini game creation, but even if the network stack was better, you have people all over the world, latency will always be an issue.