It is still around because it is nearly impossible to kill yourself with an overdose. And Shrinks are very much afraid of their depressed patients trying to kill themselves. Liability, you know.
Secondly it helps some people at least not feel the effects of the Depression if only by making them numb.
I think i might go take some myself. i have got bottles of the stuff. After 45 years of looking for a cure I havent found anything that works.