Not sure if this is an urban legend or not, but I recall reading somewhere that for many big companies, going IPv6 is simply not possible at this time. I can't

Not sure if this is an urban legend or not, but I recall reading somewhere that for many big companies, going IPv6 is simply not possible at this time. I can't remember if it was a leaked memo from AWS or another one of the giants, but their analysis was essentially that they would need to buy all the global stock for certain types of routers to do the migration from where they are right now.