In the 90's startup environment I knew a surprising number of engineers who regularly took meth and/or cocaine (and probably other uppers -- they were after pro

In the 90's startup environment I knew a surprising number of engineers who regularly took meth and/or cocaine (and probably other uppers -- they were after productivity boosts). It tended to travel in packs -- particular companies had a decent percentage doing it, while others had zero (as far as I knew). These days I hear more about the "focus" drugs -- which seem like pharmaceutical versions of the same stuff, with reduced dosage.