Thats the one thing i like about ROBLOX
in-game lua programming for implementing interactive stuff fast and easily, custom decals that everyone can see, vast amount of blocks that aren't block shaped allowing for interesting new maps and environments, bricks that can be stretched and squished to any size you want, etc
the list keeps going and i hate how people are completely calling roblox stuff just for silly reasons
i agree that the free-to-play pay-to-play model is forgeted up and the community isn't among the very best but in terms of implementation, gameplay, physics and modding roblox is in a very good position right now