Peak memory or garbage collection throughput can become a bottleneck. But if you know you have more memory than you need, further reducing allocation is arguably a waste of your time.

This can become a tragedy of the commons in desktop and mobile apps, where you don't know how much memory the end user has or needs, but you do know you aren't paying for it.

> But if you know you have more memory than you need, further reducing allocation is arguably a waste of your time.

This is absolutely not true. Just because you have enough memory does not mean that wasted memory couldn't be better used - e.g. for disk cache or to run more tasks.