Pro tip:
Den read articles about memory usage when the writer does not know the different between private working set. working set and commit size
His "proff" of memory usage usage don't not show real RAM usage. Just memory address which is a hugely different thing.
You can have 9001 process open with 500mbyte Working set each, but not actually use more then maybe 800mbyts of ram.
Since I switched from Firefox to Vivaldi, I get low memory warning almost daily in Windows, when it was just about never using Firefox.
So I guess the OS doesn't know about it's own memory use either.