I can not believe anyone really believes in the "amateur hour stuff" or similar excuses anymore, be it software or be it marketing. The old text was there for a month. A month of end-of-quarter sales. This can not have been unintentional or an oversight. No, that is not likely.
This seems likely cultural and it seems quite possibly intentional. They seem to massively overpromise, underdeliver and bait and switch as such a routine that explaining it out by simple incompetence is no longer cutting mustard IMO.
It seems possible Tesla just has no scruples about this stuff. They seem to give and take away, create and pull levers as need be, and change commitments later unilaterally if issues arise etc. Be it the countergates or the peak rate throttling or toying with quarterly games levers, free Supercharging policies and whatnot...
Here's a better theory: Maybe they got a bunch of orders in with the forever-Supercharging clause, now they can take it away when Q2 is saved (enough). Just like the Q3/2016 discounts suddenly "being found out" at the end of the quarter and only then taken away... and of course how EAP/AEB/etc. will do stuff beyond AP1 in December 2016 pending just a bit of reg-approval...
Oh and remember how they sold the P100D upgrade to a bunch of people willing to take P90DL deliveries... and now it seems possible that is not available either:
100KW battery upgrade now available $20k
I guess the shame is on me, though, I actually once again was stupid enough to take Tesla at their word at the previous Supercharging reversal! How dumb is that!
What a company... what a company...
I just did not see an infinity turning into six months. My only defence is that Tesla is usually know for the opposite.