That doesn't make a lot of sense to me, if anything this type of attack only gets more practical as the cost to compute a collision dwindles. It's not like a 0-

That doesn't make a lot of sense to me, if anything this type of attack only gets more practical as the cost to compute a collision dwindles. It's not like a 0-day vulnerability. I'm also not aware of any significant recent attempt at mitigating SHA-1 collisions that would've suddenly made the attack impractical. And in general these collisions are pretty difficult to exploit since you can't control the collision exactly.