Who can afford the performance hit?
My production server running Win XP Home has to have the firewall off just to make all the super secret company internal networks work. SFTP would cripple us!
/s, except about the performance hit being stupidly unacceptable in 2024.
Ipv4 is one of those things that works awesome, is simple, and is a victim of its own success. Ipv6 is just complicated bloat of a standard. Cool features, but nobody implements them, so useless.
In 30 years, probably useful. Until then, I’m not giving up Ipv4.