You know what I feel like I missed out on?

The early days of league when random AD/AP ratios were thrown all over the place. When certain interactions/builds could do special things. When theorycrafting and trying some off meta stuff could actually be off meta. Now any strong off meta build becomes the meta unless it's incredibly niche. Now something like AP yi would be caught way before the champion would ever be released.

Oh well. you can't have everything.