To be clear I'm not saying that alternatives don't exist now. But it's a worrying trend that big businesses, and even governments in some cases, are moving away from such alternatives being available. Look for example at the proposed age verification scheme in the EU, where they don't plan to make a version you can use on a desktop (and even for mobile devices require you use a vendor-attested device). Sure, right now it's just for looking at porn. But it seems to me that once that settles, it won't be long (a decade or two) before you start to see government IDs require a similar mobile app. That's the kind of thing I fear happening soon.