Where did "tesla say" that they will allow SRs to be updated to SR+ after purchase? Not a blog or a post by someone here, or someone in a store... but someone in an official capacity?
I havent seen that, but it sounds like you have. where was that? If someone wants a SR+ they should buy that. Even if its "just software" right now, I would expect it to cost more than the difference between the cars prices before purchase... especially given the autopilot pricing Q%$!Q$%%@ storm that just happened recently.
If it doesnt cost at least as much as the difference between the cars pre purchase, expect every tesla blog and website to pick up on that immediately and run with stories about how tesla is making the same mistake again regarding to pricing.
So, expect to either never be fully offered, or the total price to be more than the price difference between the two pre purchase. As I mentioned, I would also like to see where tesla "said that they will allow all SRs to be updated to SR+ since its software locked" in any sort of official capacity.