So why are roles like "Tank" specifically designed for, but anyone can "Support"?
The Miss Fortune Support stuff going around got me to thinking something. Every other role in the game is for a specific design style of champion. An Assassin can't step in to a Marksman role, a Mage can't effectively play a Tank role. You've got strong AP and AD builds for some of the Bruisers, but it's not usually a build that's effective overall aside from particular outlier games.
But Support role is not tied exclusively to Support champions. Any fucker with a bit of utility can queue up for the Support role. So, why is the Support role not shaped around specific design styles like the other roles are?
- Assassin Mage that can play Tank
- Assassin Fighter that has seen success in the bot lane (either role)
- Literally designed (maybe poorly) to be played in place of a traditional ADC
- ..who even knows what he's supposed to be but he can be played literally anywhere
but also mages and tanks.
is a good example of a support class champion who is at the same time not a 0cs duo lane support, but a jungler.
used to be played in the mid lane. its just his rework changed him more to a duo lane support.
can still be played in the mid lane if im not mistaken.
was sometimes taken into mid and solo lanes.
is still mainly considered a support class champion, who takes the role of a jungler.

"Death is best CC".