There was no discussion of whether it can be improved. I was just telling you that it meets the established understanding of the term "effectively plaintext," which you were seeming to disagree with.
Yeah, I would still disagree because everything is effectively plaintext in the end. The only difference is how you derive the key. There are levels of encryption, that is true but I think calling an actual encryption as 'effectively plaintext' is wrong.
Telegram CEO has access to all keys and therefore all chats. Matrix foundation has no such access. These two examples should explain the difference between "effectively plaintext" and e2ee. The main difference is not how someone derives the key. It's who can do it.
There was no discussion of whether it can be improved. I was just telling you that it meets the established understanding of the term "effectively plaintext," which you were seeming to disagree with.
Have a good rest of your day.