Simplex noise vs Perlin noise

Question

I would like to know why Perlin noise is still so popular today after Simplex came out. Simplex noise was made by Ken Perlin himself and it was suppose to take over his old algo

Answer 1

Just some anecdotal experience, the reason I used classic Perlin noise was because Ken Perlin had a C implementation of classic Perlin noise, while providing a Java implementation of improved Perlin noise. Silly as it may sound, classic Perlin noise was easier to copy and paste into my program, so that is why I used it. I always intended to get around to porting that Java implementation, but classic Perlin appeared to work well enough, so I never bothered to add it.

Stefan Gustavson has some very good C implementations of Simplex Noise, here