Why is Senna not picked in a League meta of ADC supports?

It has been a rather eventful start to the League of Legends competitive season. Not only have fans witnessed underdog teams like SK Gaming or Invictus Gaming thriving in their own regions, but there have also been many new innovative picks across the world, especially in the support role.

This trend started off at the 2022 League World Championship, when the current world champion player BeryL picked the first-ever Heimerdinger support. After teams and players slowly started realizing the ins and outs behind this unconventional pick, they started experimenting with new answers and counter-picks. As a result, traditional ADCs began to be picked as supports, first with Ashe and then others following suit, including Caitlyn and Kalista in the LCK.