&gt;  Literally just do Vyvanse then.

Agreed. But that's a slightly different question, unless you'd like to argue that Vyvanse and Adderall are also super coke for people who want to hallucinate and never sleep.

&gt; Vyvanse and adderall are much more trustworthy then street meth

That's the nature of buying street drugs. But as street drugs go, meth is pretty trustworthy. Purity is usually north of 80%, and the common cuts are harmless. It's literally so cheap to produce that there's not much reason to cut it. There also don't tend to be unreacted precursors/reaction byproducts, because the vast majority of meth is now produced by professional cartel chemists at high yield. It's a hell of a lot more trustworthy than coke--which depending on where you live is often less than 50% pure, has some extremely toxic cuts uniquely associated with it *and* often contains ephedrine or an amphetamine anyways, to make up for the reduced potency from the cut.

I think the best argument against meth (other than addiction... but that goes for all stimulants) is the stigma uniquely attached to it. If you want to talk about something resembling "super coke", I'd look in the direction of pyrolidinophenone-type stimulants like MDPV. Come to think of it, cocaine gets cut with that kind of stuff, too.