PSA: Champion in the Support position =/= Support Champion
Please note that just because Brand goes bottom with an ADC that does not mean he is a Support Champion. Support kits primarily focus on bringing utility to their team, not damage. Sona's W heals and shields while her E is an AoE speed boost for her team. Lux's Q+E provide heavy on demand multitarget CC while her W is an AoE shield. Braum's passive/Q provide CC for your team to exploit while his W and E keep your team alive.
Meanwhle, Brand provides: ONE hard to land CC, no sustain, and no utility. All he brings is damage. He's a carry mage who just so happens to be good at proccing Tribute passives and poking enemy laners with an ult that loves it when two champions stand next to each other. Like say, an ADC and their Support.

support, but I also play
and some
and
.
support because her mana management is poor and she can easily be killed. She has a harder time poking people down without expending a lot of mana. Brand doesn't if he lands his combos. His ultimate is really what makes him great down there along with his autos.
and jungle
I haven't see too many champions play out side of the role they traditionally play. The rework of
made him more of a jungler than an ADC.
is gone, and there a few other champions than can only play one or two roles. I don't see many
top or jungle as much, but I can't think of too many outliers from the season when a champion just moved to a new role.