Why would you want to use a single language, Swift, over many languages, each specialized for a certain task?

a$.$ It$$s easier to maintain a codebase written in a single language.

b$.$ Swift is an expressive, performant, and open source language backed by a large company $($Apple$).$

c$.$ It$$s slow to facilitate communication between components in different languages.

d$.$ It reduces the amount of $$reinventing the wheel$$ required across a codebase.