Ugh... I hoped Invulnerable saves were being eliminated. They were one of the more annoying additions from the 2nd to 3rd transition, and slowed the game down almost as much as AP replacing saving throws sped the game up.
Perhaps they will be much less common than in 3rd-7th, as they're giving more wounds to many more models.
Oddly enough the negation rule for that usually say on a dice roll of x, not x+. Like how I have it worded above. So a 7 would fail oddly enough, lol. But I've never been able to get any bonuses to those rolls.either.