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I use mine to have Logic Pro X running on one screen, and many plug ins open on the second monitor. Activity monitor shows that I'm generally using up about all my RAM doing this. I better get 16 GB next upgrade
 
I got 17 apps open in both OS X & W10 in Parallels. I'm just below 1GB free memory. Chrome on both OS's w/about a dozen combined open tabs, Visual Studio, SQL Mgmt Studio, 2 other code editors, email, messaging apps, and a bunch of other stuff, and Activity Monitor, of course. And can likely open more stuff if needed.

I don't usually have this much open at once, but good to see my 8GB machine is handling it OK.
 
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