A serious attempt would have included replay protection by default, from the start.
Disagree. There was enough controversy over Bitcoin Cash such that we knew it would not have majority out of the chute*. But S2X has -- or at least had -- overwhelming support.
Overwhelming support behind closed doors. They could run their fork on a LAN in that room without a condom, no problem with that. I was talking about real transactions going around in the wild, on the - you know - Internet.