Sure, when you're talking about mobile devices. (Or has it already become a thing with DSL, too?) In any case, the issue started much earlier, I'd say.
maybe its not very common everywhere but here in Germany i have seen multiple ISPs deploying DS-Lite which means you will get CGNAT for IPv4 networks. whats worse is while if you demand a public IPv4 address you will get it you also wont get IPv6 connectivity anymore. why? no idea... Interestingly, if i happen to use my own DOCSIS modem i get a true DualStack solution so this is not a technical problem for them per se. However, doing so they will force you to use VoIP instead of the IMHO way more stable PacketCable you would get with their modem...
