If you sell you'll probably not get your money back, but if
@P85DEE and I are any indication you'll absolutely love the upgrade.
I agree that if he sells, he definitely won't get his $5K back.
But like you say, the personal enjoyment and utility that he gets out of that $5K is a bargain, considering that it originally was offered as a $7500.00 upgrade before it dropped to $5K, and that it is/or was a $10K upgrade on a P90D and a P100D.
You'll hear a lot about how Ludicrous is great off the line.
But IMO, while it is true that it is great off the line for those Ludicrous launches, that really doesn't do Ludicrous justice.
How many street launches can you do before you get nailed by the cops, even if you have Insane let alone Ludicrous? That $5K amortized over the time that I expect to own the car, again, and I stress that this is for ME and IMO, and YMMV, it is more than worth it.
The maximum benefit that I tend to get from Ludicrous, is the additional passing power at highway speeds.
While Ludicrous is not necessarily a "must have", it is a "nice to have".
Finally, there are only 3 flavors of Ludicrous cars, be they Model S or X, in the current lineup.
P100D,
P90D, or
P85D .
As I mentioned earlier, I've thought about moving on because my car has the old nose.
But I feel fortunate to own a "Ludicrous" car. Even if it is "only" a P85D with Ludicrous. There aren't that many Ludicrous cars out there, of any variety, and I'd be crazy to give one up unless I were replacing it with another.
And at $140-$150K for the price of admission, at this point, I'll keep the Ludicrous car that I have and add a Model 3 or a Model S 75.