IPv6 vs NAT

Because ipv6 is hard and NAT works well enough.

Can't we move to IPv6 where there is no NAT ?

Public IPv4 address exhausted and NAT happened.Even having IPv6 is not a proper solution because of laggy ISPs(currently reaching ~50%) and the even the ISPs who deploy, do not deploy it properly. (dynamic prefixes or inbound blocked IPv6)Add to the mix that lot of people does not understand IPv6, internet became more centralized and will keep doing so for the foreseeable future.

ipv6 would solve these issues because they remove the need for NATs

There isn't one until IPv6-only ISPs (or plans) pop up offering cheaper connectivity because you don't need an expensive v4 address. NAT sucks and everyone's job would be easier if they didn't have to deal with it, but the CEO likely doesn't care about that and probably just sees the "add IPv6 support" scope and cost estimate and NOPEs out.I love IPv6 btw. I just don't think you'll see anything meaningful happen until FAANG drop IPv4 support. Imagi

Two things. First, it is nice if you don't have to allocate ports on a NAT box to make a test system available. These days you can't really count on all non-production systems having public IPv4 addresses anymore.Obviously that only works if all systems that need access have IPv6.However, the main killer app for IPv6 is your ISP running out of IPv4 addresses. Carrier grade NAT boxes are expensive and introduce all kinds of issues. Better to move as much traffic to IPv6 as possibl

IPv6 exists and works, and if we're going to expect our ISPs to get with the times we should be prepared to do so ourselves. NAT for IPv4 is ultimately unavoidable and thus excusable, but that doesn't mean that they can't use it to make the transition to IPv6 rougher on people who still need IPv4.

Well.. with ipv6, there’s no need to nat anymore

There’s tons of ipv6 only isps running dns64 and nat464 and other variations to limit ipv4 needs massively if at all

I doubt that; it's not reasonable to be on IPv6 only. ISP-level NAT for IPv4 will probably exist for a long time.