If they did end up calling it 5.5, and in another decade they have another revision of 5e, what should the call it? 5.5.5? 5.6? 5.5 version 2?
5.5 is literally the wrong name for what they are doing, and it actually causes more confusion than any other name would.
Because that would be awesome.
From now on, we will just periodically launch revisions with increasing numbers of 5. You have said it, now let us make it so!
I can only pray that one day, our children, and our children's children, can enjoy D&D 220.127.116.11.18.104.22.168!