Also, my phone follows me between vehicles and provides the exact same interface in all of them. Heck, I can switch vehicles and my podcast or music starts back up right where I left it. That alone is a major win for the phone-based approach - if I drive my spouse's vehicle for instance, or my old truck because I need to haul something, doesn't matter, they all have the same navigation and audio.
FPGA based devices that can do this, and quite well, do exist, they're just expensive. The RetroTINK-4k Pro is the top of the line as of this writing but it's a $750 converter.
For emissions related components, EPA rules do kick in though. While the current administration appears to have paused enforcement, their position for many years has been that running anything except factory approved firmware on an ECU or other emissions related computer constitutes a “defeat device” and is illegal for an on road vehicle subject to emissions controls. (Granted, in practice 99% of the reason anyone installs new firmware on their ECU, or switches to an aftermarket ECU, is for a “tune” that does affect emissions. I’m sure there is some edge case exception, but it’s very rare in on road engines.)
The alternative, and there are a very few tunes that have done this, is to prove to regulators that the tune does not negatively affect emissions in any way. In practice this is done by getting a CARB exception since they’re the ones actually checking for tunes.
The biggest problem with SE for me, and this is related to the culture issues you're talking about, is that the site has no good way of deprecating "formerly correct" answers. Even if a better, more correct answer is posted later, the reputation system has a huge incumbency bias in favor of older answers that have accumulated upvotes by being the best available answer at the time.
Their knowledge repository is slowly rotting under the weight of having to ask every time "okay, is this correct-sounding, highly upvoted answer actually (still) correct, or is it 10 years out of date?"
Unless we're ever ready to start treating bike thieves like horse thieves, that's unlikely to ever change. And I doubt we'll ever have the political will to do that, or even a kinder gentler version of it.
The concentrated force for candidates to counteract this would be an industy-wide union. Which isn't happening.. but if you look at unionized industries this is one of the major benefits for candidates, or at least for candidates who make it into the union..
As a user, I don't care about your ML model. I care about not sending you personal info. Coarser info isn't good enough - you can convince me you actually deserve my real info, or you can get no info (preferable), or you can get fake info (alternative if you degrade or break my user experience because I wouldn't give you that info).
I understand there are some legit use cases for validated info. Unfortunately, targeted advertising and other types of profiling are also common use cases for the same info. It's a lot like MAC randomization on public wifi - it sucks, it breaks legit use cases, but it was needed because too many companies were using it to track people.