In reply to George Stephanis.

While I get the familiarity issue, that's an incredibly poor reason to use when deciding this issue. Developers learn new things all the time. It's a core skill, frankly. No well run organization makes strategic decisions based on whether or not some developers have to learn new things or not.

But then, I'm starting to wonder about WP. It feels, still, like a one man show and no matter how good and well-intentioned that person, that's not really a healthy way to run things.