a successful soft fork by definition means it has consensus. So either it gets adopted because it has a super majority or economic actors supporting, or it fails and is irrelevant.
Watching the PBJ summit, Trying to steelman Lopp’s position I think he is as much just trying to get people to take it seriously and do SOMETHING as opposed to thinking this is the only viable option.
My guess is we get a new address format(optional) and maybe a rate limit on the most vulnerable p2pk utxos.