And yes, maybe someone will come up with a way to modify V3 to make it worthwhile. But I agree that without ephemeral anchors the idea doesn't make sense.

Even with ephemeral anchors, for Lightning it's really not _that_ much of an improvement. The second anchors output in anchors channels is redundant. So if we get rid of that, the only savings in ephemeral anchors is the size of the signature/checksig, and that reintroduces tx pinning unless V3 has the tx pinning problem truly fixed.