[eqvinox]

Nit: you still need DHCPv4 to send 108 ;)

But also CLAT should turn on if a PREF64 is known and no IPv4 is available, regardless of 108.

[ay]

True :) the nice thing with 108 is that it is supposed to be “seamless” - that is, you will see (by the absence of leases) that “it’s finally time” to remove it. And the legacy old devices will still continue to work till then.