Sorry, I don't think I have been explicit in my comment. The language of K8s, a system which is the so-called direct descendant of Borg, replaced C++ at that layer. Also, Go is strongly typed.
> There is no real agreement on what "strongly typed" means, although the most widely used definition in the professional literature is that in a "strongly typed" language, it is not possible for the programmer to work around the restrictions imposed by the type system. This term is almost always used to describe statically typed languages.
(random definition found googling).
Who wants to know the details of those scaling issues can google for the Omega paper.
The "proper"™ solution to those design flaws was implemented in Mesos (and to my knowledge nowhere else until now).
And yet somehow Mesos failed... sigh.
It chooses the (perceived) cheapest thing with the best marketing. Always.