Regardless of the IPv6 situation, IT departments take this position for a reason. It might be obvious to individual engineers how to safely deploy IPv6 on their home network if they fully understand all the moving parts. But large corporations with deep legacy to maintain don’t have the luxury of running a fully understood system. Isn’t that a big risk? Hell yeah, and of course they’ve all got modernization projects running. But in the meantime, they fear change - legitimately.