> And the bar for compelling any particular speech is generally quite high. Apple could not be compelled to put a backdoor in an iPhone, even though the suspect was the San Bernardino shooter, and this did not result in Apple losing their ability to sell iPhones. The courts may well hold that you can't compel a Linux distro to implement a particular feature either.

That's an entirely different situation because Apple couldn't have complied with silence. A product compliance requirment doesn't typically count as compelled speech because you can comply with silence.

For instance, COPPA is a very similar law, and it is not compelled speech, because nobody is forcing you to write software that checks if users are 13 or older. You can comply with COPPA by simply not writing software that collects data from users that are under 13. You are not being compelled because you literally have the option not to do it.

That is exactly the same in this case.