>The problem is, with modern cars it's not "just" a multimedia interface like a car radio - these things are also the interface for critical elements like windshield wipers. I don't care if your homemade Netflix screen craps out while you're driving, but I do not want to be the one your car crashes into because your homemade HMI refused to activate the wipers.

Lets invent circumstances where it would be a problem to run your own car, but lets not invent circumstances where we can allow home brew MMI interfaces. Such as 99% of cars where the MMI interface has nothing to do with wipers. Furthermore, you drive on the road every day with people who have shitty wipers, that barely work, or who don't run their wipers 'fast enough' to effectively clear their windsheild. Is there a enforced speed?

And my CPAP machine, my blood pressure monitor, my scale, my O2 monitor (I stocked up during covid), all have some sort of external web interface that call home to proprietary places, which I trust I am in control of. I'd love to flash my own software onto those, put them all in one place, under my control. Where I can have my own logging without fearing my records are accessible via some fly-by-night 3rd party company that may be selling or leaking data.

I bet you think that Microwaves, stoves etc should never have web interfaces? Well, if you are disabled, say you have low vision and/or blind, microwaves, modern toasters, and other home appliances are extremely difficult or impossible to operate. If you are skeptical, I would love for you to have been next to me when I was demoing the "Alexa powered Microwave" to people who are blind.

There are a lot of a11y university programs hacking these and providing a central UX for home appliances for people with cognitive and vision disabilities.

But please, lets just wait until we're allowed to use them.