It is decently common enough in unix. You are correct with my windows stuff it is fairly rare to set env vars to change the launching process. In the unix wor

It is decently common enough in unix. You are correct with my windows stuff it is fairly rare to set env vars to change the launching process. In the unix world though I have seen the pattern a decent number of times. With windows programs usually you see the pattern (not always) if it is ported from a unix system. Windows likes its ini/registry/cli items to do configuration. It doesnt mean the pattern can not be used in windows, I personally just have not seen it as much with native win32 apps. If you fire up something like 'git bash' you can see entire bash functions bound to env variables. I think it goes back to where windows came from. That environment space in DOS was not exactly huge (256 bytes at one point?). In unix it seems like it was much larger and expressive.