Some of my boxes have separate partitions for /var and /usr, and some of them don't. If you're tight on disk space, having the separate partitions takes away from what you could be using elsewhere, like in /home.

Is there an advantage to having separate partitions for those folders?

Greetings:

If you do your planning correctly in terms of the use of each partition and their max space, then yes, separate partitions can be extremely good.

This means that the partition where you need quota can be set up with quota; and those partitions that don't need quota will not have it set up.

This also means that directories like /tmp can be in their own partition without trying to trick the system.

Thank you.