I'm surprised the auto's, esp. Tesla, haven't figured out that all these software driven 'features' can/should be microtransaction. Normally, I hate those, but in this case it makes sense. Basically, I'm VERY likely to just buy a weekend block of time/access to the Performance Upgrade on my Model 3 when a buddy is in town and I want to show off. Or even an impulse buy at a light after having some BMW M guy needing a smackdown lines up next to me. If I can buy this access for a reasonable price, I'd do it, and they'd make money off me / people like me that wouldn't otherwise pay the extra money for that feature.
Same with 'FSD', which setting aside it's actual self-driving, I would be more willing to pay for that package for a few weeks / month when the family is doing a road trip and having it for highway use is handy.
I wouldn't pay up front for either of those feature, I just don't think they're worth the price, or would be used frequently enough to warrant the expense. I don't need FSD that often, and I don't need to blast off the line a second quicker every time I drive the car, but once in a while? Sure, if the price is right.