Re: But ...
Sure they can. They'll just go into the address market and say they're seeking an IPv4 address of a certain range and see if someone's willing to sell it. Simple supply and demand are why people aren't absolutely forced into an IPv6 address even now.
"'If it ain't broke don't fixit' is sometimes used as an excuse for the lack of courage to tell some other person that doing something will cost money now."
Which could STILL mean someone's not that willing to jump. After all, aren't there tons of firms on razor-thin margins that still use lots of IPv4-ONLY equipment, meaning jumping to IPv6 isn't an option? And unlike with Y2K, a lot of the problem is hardware in basis for performance reasons, so they're basically stuck.