So while I would say 15GB is pretty typical, I would not say it's competitive. I would say the competition died in 2013.
Disclosure: I work at Google, but not on anything related to this.
The competition ended over a decade ago, and 15GB stayed 15GB even though the price of providing it dropped 5x.
Even though they're near the top, none of those companies are "competitive" in my book.
