I disagree. A lot of hedge funds 'learned' that they had to be in the S&P500 in order not to be fired, everytime they sold stocks in the sell-offs, they would watch markets come back and they underperform. As a result, most market participants had to 'get up and dance' due benchmark risk. I believe there are a lot of people that are dancing and when they head to the exits, it will not be pretty (I can only imagine how many funds are in the FANGs and other hedge fund hotels)
Now bonds are still working as a hedge (judging by this week's action) but I'm watching it closely, if we see stocks are a bunch at some point, with bonds also down, I will be selling all my bonds and going to cash
Essentially, I believe a lot of hedge funds will struggle because they will have to implement strategies that they were punished for using for a long-time. Its hard for people to do that. Also, if everybody tries to implement them, there is not enough liquidity for everyone