@Tutanota I can't remember what all of it said, but when switching to the new plan it said my current plan was no longer available.

It didn't allow me to compare what I was currently paying for with the new version.

I'm happy to switch (I have already) but the pitch looks a little like, "pay three-to-eight times as much for potentially fewer features".

I think you could do with rephrasing it to be a bit more friendly, e.g. compare it to how much storage you currently have?