Oh, if it matters, I also run Memory Clean 2 to monitor RAM usage and do Extreme Clean from time to time.
I forgot about this because it’s basically muscle memory at this point, but maybe this is making a difference?
As of right now with just Sibelius, Scrivener, and about 40 browser tabs (no Adobe), I have 2.01 GB free.
e: I downvoted my original comment since it’s now occurred to me that this app may be why my machine isn’t struggling.