You can apply this to basically anything that starts off as an excellent niche product and then becomes massively popular.
As a basic rule, the more people you're trying to entertain then the more beige it becomes as it moves away from its original principle.
It's happened to football, it happens with TV series, movies, bands, just about anything. Eventually it succumbs to the additionallmoney to be made by appealing to the lowest common denominator.