Yes, individualism had been driven out of music for a while now. Part of that is a result of needing a neat marketing package that doesn't offend anyone! Another is that true individualism is divisive, some people will like it and some people won't, and that takes artistic bravery!

With improvisation, it has largely been abandoned due to the inherent risks. You need to be courageous, knowing full well that you might be on fire or a complete dud in a given performance. Most musicians I know would prefer a middle road, take no risks option...