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not sure what i'm basing it on, but your wife sounds much coolerI try to never have more than about five open. If I'm doing research or booking travel or something, I might have more. Sometimes I'll have two windows of Chrome open with maybe 3 or 4 windows of each, but that's rare. I'll have two different email accounts and a calendar open most of the time, so I'm only one a few pages in actual browsing.
I get on my wife's MacBook and there's about three instances of Chrome open, each with 10 or 12 pages up. SMH.