Yes you can. Those "hacks" are how you do it. I mean, you can call them hacks, but at the end of the day v4 uses a fixed-width 32 bit address field and has no

Yes you can. Those "hacks" are how you do it. I mean, you can call them hacks, but at the end of the day v4 uses a fixed-width 32 bit address field and has no mechanism to extend it in a way that's compatible with other v4 hosts. All you can do is hack around that. There's nothing that v6 could possibly do to avoid it, because the flaw is in the design of v4 and not in the design of v6.