User blog comment:Aphostropils/Questions from a beginner/@comment-5588011-20160404131126

An AD item which gives armour would be a must buy for all ADCs and would just stifle build choices which is probably why there will never be one. An ADC's weakest point is that they're way too squishy and die against assassins, if an AD Zhonyas was created assassins would be pointless, which is probably why they haven't created one for them. You could be saying "but my Lux is squishy and blahblahblah", but even though a Zhonyas is available for them, you're risking more damage/utility, especially when you can easily spam your entire spell rotation, meaning you'd be less useful the entire remainder fight, compared to an ADC who constantly needs to be alive and have a presence.

The meta shifts because of new items, buffs and nerfs on champions and items, reworks, and people just realizing how OP certain combinations a while after their changes.

With champions that are like tank/marksman, they're generally going to be trashtier, with mediocre power in both roles. Riot would just be wasting resources on champions that would probably get nerfed if they were made out to be OP, or buffed until Riot realizes they're too OP, etc. The closest thing we have to an ADC bruiser is Urgot and he's mediocre at being a bruiser or an ADC.

Adapt your build, no point building that Ludens if everyone else has 200 MR and you have pathetic damage, build a Void Staff instead, etc.