This article refers to TLDs as domain "extensions" in a few places, which is not really a thing(1). Please don't make it a thing. 1. Or at least to the extent

This article refers to TLDs as domain "extensions" in a few places, which is not really a thing(1). Please don't make it a thing. 1. Or at least to the extent that it is currently a (small) thing, it's the wrong thing.