Indeed, I expect the "3 variants available" status to persist, because it meets demand very well.
* The version for if you're on a budget
* The version for if you want max range but are still on somewhat of a budget
* The version if money's not an object and you want to drive the fastest thing around.
If Tesla gets a pack upgrade for the S and X lines, I'd expect it to track pretty much the same way it does today. - say, 85D, 115D, and P115D.