You are literally posting this comment on a story about CGNAT processing costs being wildly more expensive than a small ISP cares to deal with. To the point where they’re willing to buy and distribute AppleTVs to reduce costs.

Even if that price decreases in real terms, washing a whole bunch of traffic through a big-ass NAT is always going to cost more than just not doing that.

The cost of an IPv4 address is around $50. Annualized it's a few dollars. So, that's the baseline for where CGNAT makes financial sense.

That's a lot less than the cost of an Apple TV.