alt Hacker NewsFirst they came for the infinite scroll, and I said nothing...
That was a little hyperbolic. The government already can regulate "speech" to some extent in limited, targeted ways, as this is. For example: they can (and increasingly will) require ADA accessibility standards on web and mobile sites and apps-- even private sector-- that deal with the public.
Can they? Why haven’t they enforced this yet?
It may be that this isn’t as settled as you think when speech concerns are present. The existence of alternative accessible formats, or sufficient assistive technology in the marketplace, may be just as compliant. It’s likely that these will be favored over mandating changes that affect design or presentation, given the Court’s prior decisions on balancing speech concerns in other areas.