Online gaming: No "strict NAT" program. No conflicts with having multiple consoles at one locations. No port forwarding needed.
VPNs: Business IT usually uses some weird IP range like 172.xxx.xxx.xxx so avoid conflicting with the popular 192.168.1.xxx or 10.xx.yy.zz. When two companies merge there is now an IP range overlap and a renumbering has to be done.
P2P file transfers: No port forwarding needed.
Self-hosted servers: No port forwarding needed.
Video chat/VoIP: One reason video chat still suffers from bad quality is that video is proxied through cloud servers to deal with NAT. With more IPv6 video chat services can use more direct connectivity lowering costs and improving quality.
Avoiding CGNAT. If anyone on the same CGNAT group in your ISP got banned you will also be banned. Many Internet services don't have IPv6 and they often cite IPv4 based reputation as the reason why they won't deploy IPv6.
> When two companies merge there is now an IP range overlap and a renumbering has to be done.
That has nothing to do with OP's question about consumer internet concerns. However, I've been through several corporate acquisitions. The thing that took the longest to work out? Getting the new company's name on the paychecks.
The thing that took the second longest to work out? Renumbering networks and consolidating and decommissioning hardware for which there just wasn't enough RFC 1918 space available. Every. Damn. Time. this process dragged on and on and on, when IT could have saved 6->18+ months of future work [0] by generating a /48 ULA and using that for every internal thing but the stuff that was IPv4-only.
[0] ...and god only knows how many dollars in labor costs...
VPNs: Business IT usually uses some weird IP range like 172.xxx.xxx.xxx so avoid conflicting with the popular 192.168.1.xxx or 10.xx.yy.zz. When two companies merge there is now an IP range overlap and a renumbering has to be done.
P2P file transfers: No port forwarding needed.
Self-hosted servers: No port forwarding needed.
Video chat/VoIP: One reason video chat still suffers from bad quality is that video is proxied through cloud servers to deal with NAT. With more IPv6 video chat services can use more direct connectivity lowering costs and improving quality.
Avoiding CGNAT. If anyone on the same CGNAT group in your ISP got banned you will also be banned. Many Internet services don't have IPv6 and they often cite IPv4 based reputation as the reason why they won't deploy IPv6.