Minecraft has evolved a lot since its release, most of the servers today do not take advantage of vanilla features and even have to struggle because of them. Our target audience is those who want to make a completely different server compared to vanilla Minecraft such as survival or creative building. The goal is to offer more performance for those who need it. Minecraft being single-threaded is the biggest problem for them.

In other words, it makes sense to use Minestom when it takes less time to implement everything you want than removing everything you don't need.