Toys'R'Us is headed the same direction. They outsourced their online market to Amazon in the 2000s. In doing so they purposefully chose not to innovate in a changing market.

I read an interesting article a couple of days ago comparing Amazon to Sears. http://fortune.com/2017/09/25/amazon-sears-parallels/

It goes to show that the size of a business does not matter nearly as much as its momentum.