"It can improve forever". Or as long as Tesla cares.
Tesla owner attitude to a safety feature: "it doesn't matter that yours works great out of the box, and this one doesn't work, is one of the most complained about features and has been for years, what _really_ matters is that it _can_ be improved!"
If another manufacturers rain sensor was so faulty (because that's what it is) as Tesla's, it'd be repaired and replaced and no expense to the customer either. What's more is that it's a simpler system, that has worked reliably for 20+ years, and is a "solved problem", unless Tesla thinks there's some new rain situation that we're yet to encounter. Inventing a needlessly complex system that fails to do what a simpler, cheaper system does reliably and saying "oh well, you just don't get it, it can at least get better!" is cognitive dissonance.
Tesla owner attitude to a safety feature: "it doesn't matter that yours works great out of the box, and this one doesn't work, is one of the most complained about features and has been for years, what _really_ matters is that it _can_ be improved!"
If another manufacturers rain sensor was so faulty (because that's what it is) as Tesla's, it'd be repaired and replaced and no expense to the customer either. What's more is that it's a simpler system, that has worked reliably for 20+ years, and is a "solved problem", unless Tesla thinks there's some new rain situation that we're yet to encounter. Inventing a needlessly complex system that fails to do what a simpler, cheaper system does reliably and saying "oh well, you just don't get it, it can at least get better!" is cognitive dissonance.