> 90% of customers I'm probably being pedantic here, but shouldn't this be 90% of devices? If I have three wifi devices at home, but then I go out and buy a f

> 90% of customers I'm probably being pedantic here, but shouldn't this be 90% of devices? If I have three wifi devices at home, but then I go out and buy a fourth one -- and I find out it can't reliably connect. I've just fallen into the 10% zone. So I order a new router - I get it set up and now my new device works. Yayy! But now one of my older 3 devices has stopped connecting. I'm still in the 10% failure zone, even after spending a hundred bucks on a replacement for a router that was "mostly" working. So I keep both routers, assigning different SSIDs so the wireless devices will only find the routers they like. Have I now decreased my overall reliability because I'm now running in the "And" case with it's 90x90 multiplication, not the "Or" case? Most likely.