Street meth is often quite pure (>90% is not unusual) and this has been true for decades. With that in mind, I can't really figure out what this alleged supermeth being referred to could be.<p>I think the trend here is pretty simple: high-purity crystal meth has become significantly cheaper over time, enabling people to engage in sustained binges at high doses that are both just deranging (imagine a week of no sleep) and particularly at high doses, neurotoxic. So, more meth-crazy people. Where I live, it's roughly 1/5th what it cost twenty years ago.