NAT accelerated hardware exists almost everywhere now. But yes NAT is a pita overall. CGNAT is even more of a problem.
There is a talk by Dmitriy Melnik at RIPE 91 about the costs for ISPs to not adopt ipv6 vs to adopt ipv6 (relevant stuff starts at 9:55).
https://ripe91.ripe.net/programme/meeting-plan/sessions/37/8...
https://www.reddit.com/r/openwrt/comments/1lopamn/current_hi...
Tell that to my fixed line provider, with their CGNAT ... And its just about every provider in Germany pulling that crap. O, and dynamic IPv6 pre-fix also, because can't have you run any servers!
Yes, plenty of ways to bypass it but when you have ISP's still stuck in 1990's attitude, with dynamic IPv4/IPv6, limited upload (1/3 to 1/5 of your download), etc ...