As a network engineer for over 2 decades, I've been skeptical of IPv6 for the majority of them.
I still am.
As IPv4 becomes more scarce, two economic forces trigger
1) They become more valuable (read more desired). IPv4 has all the network effects going for it. It's where 99.9% of the Internet already is. .1% being IPv6 only devices.
2) To counter the rising value/cost: Workaround/Kludges/Alternatives to every devices needing a globally unique address are tried. Everyone is going to reply with how awful NAT is, and I concede it has its flaws. However, it is hard to deny its success so far. Business then do the cost benefit of the shortcomings of things like NAT vs selling their now valuable IPv4 address space, think where they are going to come down?
I still am.
As IPv4 becomes more scarce, two economic forces trigger
1) They become more valuable (read more desired). IPv4 has all the network effects going for it. It's where 99.9% of the Internet already is. .1% being IPv6 only devices.
2) To counter the rising value/cost: Workaround/Kludges/Alternatives to every devices needing a globally unique address are tried. Everyone is going to reply with how awful NAT is, and I concede it has its flaws. However, it is hard to deny its success so far. Business then do the cost benefit of the shortcomings of things like NAT vs selling their now valuable IPv4 address space, think where they are going to come down?