Getting older and the accompanied lack of free time is the single largest contributer to me stopping game piracy altogether. My back catalogue is so large that most games are old and deeply discounted by the time I get to them.
There are a few exceptions that will get my day 1 payment, basically CDPR and the Mass Effect franchise.
It's part convenience as well though right? Surely, the way digital market places have made it sooooo much easier to buy stuff now (not too mention numerous sales with great deals) has impacted piracy more then any DRM implementation?