Various software vendors who dont support IPv6 and render IPv6 only setups without any kind of tunneling useless. And for the worst part play it down with stupi

Various software vendors who dont support IPv6 and render IPv6 only setups without any kind of tunneling useless. And for the worst part play it down with stupid reasons in 202x. My favs "Why you need IPv6, just use 6to4 tunnels", "what do you mean IPv6 only?", "We dont have the resources", "It will take some time die to major changes in the software" - jesus... I tried running IPv6 only with one machine (VPS in own hypervisor) but gave up after 2-3 hours of yak shaving and quickfixing things that should just work out, official Ubuntu repos not speaking v6 was one of them.