I think Swift was developed to keep a number of constituencies happy.

You can do classic OOP, FP, Protocol-Oriented Programming, etc., or mix them all (like I do).

A lot of purists get salty that it doesn’t force implementation of their choice, but I’m actually fine with it. I tend to have a “chimeric” approach, so it suits me.

Been using it since 2014 (the day it was announced). I enjoy it.

No Swift was developed as a strategic moat around Apple's devices. They cannot be dependent on any other party for the main language that runs on their hardware. Controlling your own destiny full stack means having your own language.