I appreciate you being brave enough to step into this mine field. People feel very strongly one way or the other. I think that both approaches have strong positives and strong drawbacks. Knowing which works where is what makes a good engineer. Having all sorts of tools in your belt to solve problems allows a developer to succeed in many situations.

The main reason that FP won't kill OOP is the same reason we are looking for COBOL programmers in today's market. Some tools are just really good for certain problems.