This PC never crashes. Windows has the ability to manage the memory resources and will free up RAM if it needs to execute new apps. It's not a retirement fund that needs to be saved. It's a resource that is there to be used. The more the better.
System resources can run pretty low before problems exist.
There are some must haves in there, but anything you do is reversable so go ahead and play around. The bottm line is, how is the PC running . . . . Thanks a lot, that answers a lot of questions. Net is the opinions of its users. Such opinions may not be accurate and they are to be used at your own risk.