I would only say that usage of 25GIG RAM, in case you own 32GIG, is not worst.
Why not use the RAM which exists, for which you pay’d ? 
What a application not should do, is try to consume more memory as you have RAM installed. And this do MSFS and creates a high load at the pagefile. In special is there also a commited memory value, here is an example how it looks if Taskmanager tell that MSFS consume 16GIG memory.