Saying “large parts of the world can’t access [IPv4]” is massively over exaggerating the situation. Particularly when most of the web is still IPv4 only.
You do actually realise that even users with only an IPv6 address can still get access to IPv4 sites via bridges (the names of which escape me off hand)?
You do actually realise that even users with only an IPv6 address can still get access to IPv4 sites via bridges (the names of which escape me off hand)?