^
None of this explains away the fact that pre-V3, P90DL didn't meet the advertised quarter mile. So tuning it downwards would not exactly be the solution either.
The P90DL and the 10.9 quarter have already been beaten to death.
I'm not saying that they're looking to cut the power in the so called V1 cars.
But rather I tend to think they're looking to dial back the power on so called V3 cars, if and when they can. So called V3 cars, are cars that they've never acknowledged even exist.
There is no official word from Tesla as to if more than one version of P90DL exists.
It's these cars in here which we have named "V3" which are thought to have the best performance capability of all P90DLs released because of their additional 60kw of power over the earlier cars.
However they are also still early in the warranty period.
It's sounding to me like they've discovered that the additional power added to these cars and the use of that power "enough times" has probably increased the odds of failure of some type in those cars.
If there is an increase in failure risk in those cars when driven hard and for enough times, and Tesla is attempting to decrease their exposure to warranty claims, well then cutting the power in those cars to at or near the pre existing V1 or V2 levels might mitigate some of that risk.
Or at least put it at the level that it was before the few 510 kw versions of the P90DLs showed up.
Since they've never acknowledged that there are stronger and weaker variants of the P99DL, they can cut the power of a 510kw "V3" P90DL down to the 450ish kw of a "V1" P90DL, and then still insist that the owner "still" has a P90DL as it's still as "strong" as the P90DL that they sold months prior, and as they've never made made any distinction of P90DL "types" or "versions".
We are the ones who did.
In fact, if they really wanted to get creative, they could call that extra 60kw a "flaw", which could cause excessive wear and tear on drive train parts, "ruining the overall driving and ownership experience" and insist that they had three options to correct this flaw, neither of which would require the owner to bring the car in.
Since it's not a safety issue, no NHTSA and no recall needed.
Option 1: immediately cut the power in those cars.
Option 2: leave it alone and hope that it wouldn't fail and ruin the owner's "overall driving and ownership experience".
Option 3: cut the power in those cars on an "as needed" basis.
For example if it became apparent that it was going to break and "ruin the owner's overall driving experience" if it continued to be driven in the manner that it was being driven.
A "counter" would be in place to prevent this.
"...To help protect the performance and longevity of the powertrain, Performance versions of the Model S and Model X, continually monitor the condition of various components and may employ limiting controls to optimize the overall driving and ownership experience." 
But most importantly the P90DL V3 angle does not explain what the Tesla employee told
@NSX1992, which does suggest a significantly wider phenomenon than P90DL "V3"... Emphasis mine:
They also told him to "keep racing".
I'll be honest with you. The minute he came back in here, a few months ago, and said that someone at an SC had told him when he inquired about his warranty coverage and racing, to "keep racing", I knew then not to trust anything the people at these SCs say.
There's not a manufacturer out there which is not going to take steps to protect itself against warranty claims arising from racing.
I'm less likely to take the techs words as gospel after some of the things that some of us have been told
Again, the tech's comment is both in line with Tesla's P100D disclaimer and offers additional, very specific information suggesting knowledge on the matter. Also, rest of NSX1992's message does read like an indictment on a wider Performance range than just P90DL V3 - assuming the Tesla employee (and report on it) was correct, of course.
It may be correct.
And I'm not saying that they aren't leaving the door open to cut the power of any of the versions of P cars. Or any Model S or X for that matter.
I'm just saying that to my eye, it seems that this started just after or around the time that the 510kw versions of the P90DL would have had time to gone back with broken parts due to hard driving.
We first started seeing that variant about 6 months ago.
Now, 6 months later, possibly after a few of them have come back, or Tesla has now figured out that some will soon be coming back, one of them gets its power cut.
Before then, when P90DLs were pushing 450ish kilowatts, we didn't hear any rumblings about cutting anyone's power to prevent warranty claims and we certainly didn't hear anything like that when Insane was out.
The timing on this just doesn't pass the smell test for me.
