It's only useful for the degenerate "run lots of instances of webapp servers running slow interpreted languages" use case.
Trying to do anything else in it is madness.
And for the "webapp servers" use case they could have built something a thousand times simpler and more robust. Serving templated html ain't rocket science. (At least compared to e.g. running an OLAP database cluster.)
It's only useful for the degenerate "run lots of instances of webapp servers running slow interpreted languages" use case.
Trying to do anything else in it is madness.
And for the "webapp servers" use case they could have built something a thousand times simpler and more robust. Serving templated html ain't rocket science. (At least compared to e.g. running an OLAP database cluster.)