Archbishop Lefebvre was the leading figure in Traditional Catholicism for about 15 years, and never pulled the trigger on becoming a sedevacantist. Not a few priests have (or had) been Traditional Catholic for 50 years without going sedevacantist.
+Vigano has gone from a high-level Conciliar official to a Resistance position in about 2 years, leapfrogging over the SSPX, which has passed over to the left of him. So God knows where his journey will lead him.
Lots of people spent decades in the Conciliar Church before receiving the GRACE to be awakened. I capitalize the word to bring to your attention that you did nothing to deserve it. Perhaps the graces he received in battling the sodomites led to other graces, and then he went into hiding and started to offer the True Mass, which of course led to many other graces. It's only by the grace of God that you have been Traditional Catholics longer, and you need to remind yourselves of that.
You remind me of the parable regarding the laborers who toiled all day in the vineyard and then resented those who came at the 11th hour and got paid the same. This is precisely the point of the parable, that everything either group received was due to the generosity of the Master, Who can choose do distribute His graces as He pleases.
I don't understand the contempt that many sedevacantists have for +Vigano; that's the kindof stuff that makes sedevacantism look bad to a lot of people.