That's how I view it as well. There are some parts of the stack where I am more proficient than others, but I know I'm able to onboard pretty quickly to start s

That's how I view it as well. There are some parts of the stack where I am more proficient than others, but I know I'm able to onboard pretty quickly to start solving problems regardless of whether it's frontend, backend, infra, whatever. I guess when I think of full stack, in practice I think of someone whom the linked article describes as T-Shaped: probably especially proficient in one thing, but able to rotate and be useful wherever needed.