User blog comment:YourPrivateNightmare/Hail the hourglass!/@comment-8506165-20130915094720

Would consider if the active were particularly essential. 90% of the time it would lose out to QSS though because the Zhonya's active has identical cooldown to the Quicksilver active, and serves much the same purpose (QSS gets rid of Zed's ult, Fizz's ult, Vlad's ult, etc. etc.), but QSS builds into something that actually gives AD.

I can see it, but it's very, very situational. Maybe if they had a Malph constantly ulting onto me followed closely by their Kha'Zix Leaping in for the kill then the active would win out then to give my team more time to peel, for instance.