[KPGv2]

That's not what 16.4 says, although I can understand how you'd think that (and personally, I would not have written 16.4 this way, and I've had a longstanding issue with a lot of software license phrasing; used to find all sorts of loopholes in partner agreements even with enormous companies like AT&T). 16.4 warns the user that terms might change, those terms will be available, and continued use of the product after the new terms are promulgated will constitute acceptance of the terms.

You can even see this in action: https://zed.dev/blog/terms-update

When new terms come out, you're forcibly signed out of the Zed service and have to agree to new ones before using the service again.

It's most likely the case that this clause was written so that someone using the service, when offered new terms, can't say "nah, Imma stick with the old terms" and then claim Zed aren't allowed to revoke the license.