[Dylan16807]

Notably Microsoft used to offer 15GB until decreasing it a decade ago.

So while I would say 15GB is pretty typical, I would not say it's competitive. I would say the competition died in 2013.

[Thorrez]

If the top offer is 15 GB, then 15GB is competitive, even if multiple providers offer it.

Disclosure: I work at Google, but not on anything related to this.

[Dylan16807]

Competitive implies competition.

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.