Works for every situation. Combat, drywalling, house framing, bottle recycling, metal scrap collecting/stealing, sitting in the corner rocking back and forth...
I don't know I have a flooring company and it's just me and a couple employees I have and one of them was smoking meth and became the worst worker ever and I had to fire him. He would crash and sleep for days not showing up or answering his phone then he'd be all fucked up on meth rushing things and breaking stuff in customers homes ect. Just awful and unreliable, an absolute loser.
To be fair I didn't know he was using meth when I hired him and I only hired him because he's my brother in laws sisters boyfriend and they asked me if I'd give him some work because he was struggling lol.
If I knew he was a meth head I wouldn't have gave him the job.
There's a difference between semi-medical amphetamines, like Pervitin, and just smoking meth. Ritalin/Adderall are amphetamines too and people seem to work just fine on them.