Marketing doesn't create reality, but the courts do and sometimes what a word means in a legal context is different than in conversation. It usually hinges on some standard of being reasonable.

Sure, and marketing which expects people to use their standard of "being reasonable", while the service being offered under a different standard of "being reasonable", is essentially bait and switch. That only a small subset of customers notice it doesn't make it more OK, it only shows the company is not dumb.

I don't know if I'd call it a bait-and-switch. Gmail is an email service and the purpose is to send and receive emails. Getting upset that you can't use it as a general purpose storage service isn't reasonable (IMHO). There was no baiting in this regard.