>>105553110
>Use MMD
>Have access to the official model and a library of motions people have made
>Use Koikatsu
>Don't have the official model, but have a pretty good approximation
>This approximation is built for sex and doesn't have to be tweaked into doing it
>And tens of thousands of outfits you can dress them up in with minimal effort
>And a huge library of sex animations
>And an even bigger library of pre-made scenes you can just dump them into for a quickie

MMD is the awkward middle ground between serious animators (Blender) and hobbyists (Koikatsu) and there's not much of a place for it these days unless you cut your teeth on it and know the ins and outs to an extreme degree.