Why is buffering spells from cc not a thing?

It has happened so many times where I get cc'd and have an ability to help escape or to use to prevent a cc chain (like fiora w, lucian dash, etc...) but because of the way ping and button spamming operate I can not always use these abilities right out of cc even if I tried. I think it would be a nice quality of life improvement to the game to add spell buffering for the last spell/ability pressed while in a cc chain (at least as an optional feature). It would help to better curb frustrating moments where you know you meant to use a spell but couldn't in the micro seconds between cc in chains and also serve as a good way to even the playing field between players playing on different pings.

(If this is a thing I haven't seen it act reliably in game for a while and if it isn't a thing i simply ask why)