I monitor RAM usage by setting the Task Manager to Always On Top (is there a better way, a better utility?). Graphics set to High.
After about 30 minutes flying the Otter out of SeaTac (KSEA) around Seattle and towards Bremerton (KPWT), the RAM hits 100%. Then it falls to around 40%, then ZERO, then CTD (no Bugsplat).
This to me is the highest priority bug to fix.