Huh, I thought a11y was a weird way of saying 'ally', but it means 'accessibility'.
The 11 stands for how many letters are between the a and the y in the word, kinda like kubernetes and k8s, with the 8 standing for how many letters are in the word between the k and the s.
Thanks, I hate it!
I feel like convenience (fewer characters to write/type) at the cost of clarity and understanding goes against everything that accessibility stands for 
Maybe it's just me, but that's anything but intuitive.
@arielmt @maddy oh perilous rocks ahead, bc tumblr is now trending a return to 133tspeak.
if they don't get distracted by [cutting down cameras] Halloween, and the gimmick blogs show up? this may be even *less accessible* by the holidays.