Now currently I'm not in the workforce, but in the past from my work experience, apprenticeship and temp roles, I've always seen ipv4 and not ipv6!
Hell, my ISP seems to exclusively use ipv4 (unless behind nats they're using ipv6)
Do you think a lot of people stick with the earlier iteration because they have been so familiar with it for a long time?
When you look at a ipv6, it looks menacing with a long string of letters and numbers compared to the more simpler often.
I am aware the IP bucket has gone dry and they gotta bring in a new IP cow with a even bigger bucket, but what do you think? Do you yourself or your firm use ipv4 or 6?
Are you going to assume the risk of this change, and pay the millions upon millions of dollars to make it happen, and for what benefit?
We have thousands of devices that simply don't support it (because they were designed before IP6 existed. You going to pay to replace them, and the labor to replace them, and the reprogramming to replace them, and the RISK you create while doing this?
Dumb is right. Hubris is another word that comes to mind.
If your devices are that fragile, they shouldn't be hooked up to the internet in the first place. What are you doing hooking NETBIOS token ring networks up to the web?
If you want to talk about risking breaking things, imagine the glorious lie that NAT introduced. Thanks to these old devices, your router at home/small business parses every FTP connection, every SIP message, every H.363 call, modifies its contents, and opens one or more ports in the firewall just to keep old stuff from breaking.
If your crap survived NAT, it'll survive IPv6. And if it can't use IPv6, that means you don't need to worry about it and you can just keep using IPv4 on these things like you always have!