Nightmare scenario for everyone.You're going to be very hard pressed to find any parents and legalizators that are willing to let the Internet continue being a Wild West and let kids access whatever they want online.
If there is going to be age verification (it's going to happen anyway) then I prefer that this is done on an operating system level because this puts the burden on state governments and operating system developers rather than putting the burden on websites.
If there is going to be age verification for the Internet then I prefer that websites aren't heavily burdened with this and pushes for incentives for state governments to update their cybersecurity practices and incentivize operating system developers to adopt better cybersecurity standards for their operating systems.