I need the code to be SOLID, I need the time to market to be as small as possible and I need to be able to replace any developer with any developer on a moments notice.
When students don't know lambdas you're costing me money by using them, because you made the training process longer.
I have yet to see a C++ codebase which was good while not written by people who are essentially C++ experts, or through in-depth code reviews by such, for all code. I understand finding the talent may be hard, but then the C++ volume might need to be decreased and replaced by something less demanding, or the code will likely be anything but solid.
As unpleasant as it is, this is all too widespread, because it seems like common-sense on the surface. "A little knowledge (on the part of management) is a dangerous thing."
Interestingly, you can think of lambdas a small functions with single responsibility, which happen to be easy to find (they're inline right there in the code and you don't have to hunt around for them).