> it's hard, impossibly so, to construct a world where nobody with wrist mobility problems will ever encounter a round doorknob they'd like to open.

its not that hard to get to 99.999% though.

stop selling door knobs, or doors that accept round knobs. add incentives to swap or return round knobs. include checks for round knobs both for building inspections and insurance.

you wont wont get the last couple people that build their own doors and machine their own knobs, but thats gonna be a really small segment

> stop selling door knobs, or doors that accept round knobs.

Ok, but that's not a "Silicon Valley" thing.

Go talk to politicians or Home Depot and Lowe's and the home builders conventions.

That's why the post screams of mis-placed anger.

Silicon Valley probably would invent FaceID / NFC / Passkeys / WIFI authentication for doors - but that doesn't mean they'll get installed anywhere.

You can't talk about things from a social model perspective without modeling the political realities of the policies you're proposing. A national ban on the sale of round doorknobs would not pass, and local bans would create an enormous backlash which might well ruin the longstanding consensus that ADA compliance requires levers.