When a program crashed in OS 7/8/9, it would often take down your whole system due to lack of memory protection. Also setting max RAM for each application one by one was tedious and annoying. While I wasn’t a huge fan of the skeuomorphic bubbly OS X interface, I was ecstatic to leave all that memory management nonsense behind.
It’s a modern Escape Velocity and captures the feel of those games very very well.