For me it's less about older and more about simpler. Sometimes I just want to take the brain out of my head and set it somewhere to get some rest. Older and some indie games are just a fun way to pass some time without really thinking, for me personally. Sometimes I will fire up Mahjonng to pass some time. There's no commitment, no social aspect, nothing complicated. It just feels like it gives the simplest part of my brain a snack.