Then why did Intel and AMD add it to their chips? My guess is AVX is used for when it is worth the effort. If I had to guess, it is used for scientific comput

Then why did Intel and AMD add it to their chips? My guess is AVX is used for when it is worth the effort. If I had to guess, it is used for scientific computing, maybe video processing (as in movies, TV, etc.), maybe audio processing, etc.