What the heck is up with 8-3/4" rearends?

E body 8 3/4 still cheap/

Too wide for A body, but still around and cheap.

Glad I stocked up on chunks a few years ago, as I have noticed a spike in the prices for those.

For the record I think they actually are making an aftermarket 8 3/4 housing but they're like $1000.