> … replace a green screen in a team of 20 other programmers…

I was briefly involved with a project that sounds a bit like that — a 2 week training course for current staff, then rewrite everything from data model to U/X in half-the-usual time because someone said OO is more productive.

That project used ENVY/Developer. The staff admin deleted the repo. The staff wouldn't have passed phone screen for Smalltalk work (maybe some would have in 6 or 12 months). When the people don't know the basic tools, that's what matters.