This happened at an old employer of mine. We started to go down the FP road, veering off the standard OOP of the day. About 25% of the people picked it up immed

This happened at an old employer of mine. We started to go down the FP road, veering off the standard OOP of the day. About 25% of the people picked it up immediately. About 50% got it well enough. And 25% just thought it was arcane wizardry. Between that latter group and the bottom portion of the middle it sparked a big culture war. Eventually leading to leadership declaring that FP was arcane wizardry, and should be eradicated.