What does "as it gets" stand for?

Question

Always appears with an adj such as complicated, and with another "as" previously.
Is it to enphasise?

Answer 1

It is another way of expressing the superlative form of an adjective.
The food was the best.
The food was as good as it gets.

Answer 2

It means to its its furtherest limit whatever that is according to the definition used.
For example:
as good as it gets---it's the best it can be.
as complicated as it gets---it's the most complicated it can be.
as warm as it gets---it's the warmest it can be.

Answer 3

"Gets" in this sense essentially means "becomes"

As in:
"How dark does it get?"
"When it it is midnight, and there is no moon, that is as dark as it gets."

It doesn't always mean "the best"

As in:
"The food here is pretty bad."
"Well, that is as good as it gets."