Diversity and interesting things for one. It was just so much easier to find interesting things in the past, because everyone was trying to do something naughty in a good way.
Now you can't take a step without hearing people talk about how they are joining Slack or whatever with great comp as a Team Lead and building slow as hell software.
Just curious - what have been the negative effects you've found of the hacker space shrinking? And what reasons do you think account for it shrinking?