In the early days of MMD, there was only dancing, and it was still only Miku. Later, many artists began to change the models. They became colorful, nude, and then sexual works began to appear. Because in the early days, only the software MMD could create works, the works at that time were called Make MMD. Later, many authors saw that MMD could be made into 3D videos and began to create a lot of them. During that period, many super high-quality ideas and works appeared...
Then, with the advancement of science and technology, programs other than MMD can play 3D games. If you are thinking quickly, you will think of whether it can be made into a video like MMD.
Then you see the work of HS2 VAM KK.
The most important thing is because in those games you can edit scenes and actions and then share them. It is not like MMD where certain actions need to be modified and edited by yourself.
Many authors are lazy and don't want to use their brains and just use it directly, resulting in a huge number of works of the same type.
So MMD is just a title. Or do you want to see the earliest MMD pure dance works without sex appeal or sex?