We have so many great, specialized tools. But the act of development often bifurcates into "problems that don't have to scale, or even present a great interface" and "problems that need extensive customization at every layer and support millions of users" and our stacks reflect that.

So tooling choice is often more dependent on maximizing leverage while setting appropriate cutoff points for scalability - in almost all production scenarios you are better off simply to design the system down to the featureset of available off-the-shelf tooling and anticipate a hard break where it migrates upwards, versus thinking you have to boil the oceans immediately so that all facets can be transitioned smoothly and all features are possible right now.