I used pstore for an ad-hoc monitoring service on an outdated windows server running an outdated ruby version - it was easy to set it up to run from task scheduler every five minutes and check resident memory of an old ruby service - logging the ram, and killing/restarting it if it was over 1 GB (this all on 32bit ruby with the limits of 4gb address space per process).

Sure there are many things that "should" have been fixed above - but just having any old ruby version on hand was enough to help check for a memory leak and mitigate it - while taking the time to figure out if the leak could be plugged.

And offline support (a server in dmz/locked down wrt new software) is big too!