With regard to datacenter operators, I would argue that a simpler answer to that observation is that they are investing heavily in the are in which they can act

With regard to datacenter operators, I would argue that a simpler answer to that observation is that they are investing heavily in the are in which they can actually effect change. That is, they can swap in-and-out their hardware, but language of choice is largely up to their customers - the dev. They can advocate and champion a particular language, but really enforcing it in any meaningful way is narrow casting their own user base.