I actually closed out all my positions prior to this big rally. Not because I foresaw it coming, but I needed the cash in that particular account for something else, plus I had too much on my plate. But, yeah this market would have hurt a portfolio full of short call positions, but less than a short stock portfolio as the premium would have offset the losses somewhat.
Thats cuz you have been lucky. One day you going to wake up and find your underlying is up 20% on a buyout. Better to buy otm puts on extended stocks. Buy them on a big big up day. Bid for them. Don't pay the spread. John