No one really knows, beyond the published specifications, what energy densities Tesla is getting out of 4680 batteries they've produced or what the improvement potential is.Based on what we see in the MYAWD - it has a full size 4680 pack that simply doesn't even reach the range of the existing MYLR.
At best, if they get the 4680 pack better optimized, they will have the option to move the MYLR to the new technology which should save them on manufacturing and assembly costs. I don't see any path right now to a MYXLR without going to yet another completely new pack design with more cells which I don't think Tesla is motivated to do since they sell every MYLR they can make at the existing range and they need the cells for CT and Semi.
No one really knows whether the current 4680 structural packs are software limited or not.
No one really knows anything beyond what's being speculated in the blogs. And That's Tesla's Way.
So anything is possible, however far fetched or conservative in opinion.