That source doesn't support the GP comment. End-to-end encryption 1. doesn't exist yet for any user, and 2. does not mean free user calls will be less encrypted than they are today with server-client encryption. Zoom is not claiming that paid calls today are E2E encrypted.
Yes but Zoom was saying that E2E is something they want to offer for their paid users, but that they will not offer it for free users. I think it's relevant to the parent comment in that they were asking for more information about what Zoom said concerning encryption on free vs paid users.
I think most people mean E2E when they say encryption, because server-client encryption is almost a given now, and does nothing to stop companies from helping law enforcement.
I missed that one, do you have a source?