Sure, I get it. For me a 2x Max would be ideal and usually enough. Now, guess why they are not offering that?

Where do you live? I'm in the midwest, US, and theoretical savings between 2x and 5x amounts to a single full bag of groceries. Literally.

How can this possibly be a concern?

Same here. I'd love a 2x Max plan! More than enough usage for my needs.

Just make two plans and switch, when one of them is exhausted.

Yes, I hear that is what people do. Annoying though.