Just to clarify this, when it was announced, Musk did indeed say the offer would be made available to P85D owners for six months. But it was never clear if that meant "six months from today" or six months from when Tesla actually started selling or installing the upgrades.
I made sure to pay for the deposit on mine within six months of the announcement date, and advised others to do the same, just to be safe, but I would not go so far as to say that it is clear Tesla is making this available for "far longer than six months...", as I believe the first upgrades were performed in late November, 2015.
Well to be fair, you edited out a key portion of what I said in that sentence.
What I said was;
"They're still advertising it, and apparently it is still available much longer than 6 months following the initial announcement of it."
I'm sure that it was an oversight, that portion "following the initial announcement of it" which caused you to edit it out of your quote of me above.
Yes, there were discussions about this. I believe that you and I may have had one. However if the following text from the Three Dog Day information is to be taken literally:
...... "In appreciation of our existing P85D owners, the pack electronics upgrade needed for Ludicrous Mode
will be offered for the next six months at only $5k plus installation labor."
Three Dog Day
It doesn't say 6 months after the initial installs.
Taken to the letter,
"for the next six months" would indicate January 17, 2016 as the cutoff of the "offering", as "the next six months" would be on that date. However we are now into April and apparently it is still being offered for sale.
Hence I think that it is fair to say that this offering has continued for far longer, almost 3 months longer, than it was said that it would be available.
Best case scenario, Ludicrous was put up for sale on the Tesla site on September 25th, 2015, and even that was over 6 months ago and it is still being offered.
P85D Ludicrous Pre-Order Upgrade Available 9/25/15