Well, there's still truth to it in other cases, I think. One terrible thing GCs can do is make your performance unpredictable. In some performance-sensitive sit

Well, there's still truth to it in other cases, I think. One terrible thing GCs can do is make your performance unpredictable. In some performance-sensitive situations (eg: video games), your worst-case perf is more important than your average case. Adding a GC can mess with that worst-case behavior, and in unpredictable ways. That being said, modern GCs are much better (less "stop the world" stuff), and more configurable. But it's still a real concern.