Makes no sense.
They will resell the car with free supercharging anyway
Unless they are going to destroy the vehicle, it’s not about taking away your free supercharging
INAL&HNH1: My legal understanding is that they can only disable free SuperCharging if
THEY own the vehicle; if instead you sell a car
WITH free SuperCharging to another person, that other person gets that car as sold, with the free supercharging, according to Tesla.
Brainstorming: So, if you have a friend who actually has a legitimate need for free SuperCharging (relatively unwealthy yet takes a lot of long distance trips) and wouldn't be ripping Tesla off (like a cab service), you probably SHOULD sell it private-party and buy the upgrade out of pocket without the free SuperCharging, if of course you aren't the relatively unweathly not-ripping-off-Tesla party who wants to travel long distance often AND you don't absolutely love your car AS-IS better than if you traded "up" (sometimes a "trade up" isn't a trade up). The best long-distance cars are the 85 & up (I prefer dual motor due to superior curve handling, but alignment & tire & wheel & suspension maintenance is more picky and expensive and straight driving is more exhausting in a dual motor unless it's under autopilot) in my opinion. If you're small statured, Model S is a great car, and so is Model X and Model 3. If you're big statured, often Model X or Model 3 is a better replacement, depending on fit. But I wouldn't call any of those an upgrade except Model X for a big person, unless you love the partial autopilot assistance features and can afford them (and can handle its mistakes) and what you had before didn't have (as) good autopilot. Another good reason to get a newer Tesla is to re-attain warranty status for those people which that is a good idea (I question whether there's actually anybody really in that group except for people whose Tesla cars are already about to cost a bundle in non-warrantee repairs), and similarly maybe to hopefully get past shaking out the early teething pains of a new car and get it into a long run without a lot of shop visits rather than what you already own which might be in its decrepit age. Another upgrade would be from a very small battery (60 or 75) to a much larger battery (100, or if cost is low enough, a 90 or something); I
might consider it an advantage to upgrade a 60 to an 85 or a 75 to a 90 if there are other advantages, too, but be aware that degradation of an 85 or 90 is an issue in comparison to a 75 or even a 60 in extreme cases.