Some of the comments below are part of the explanation why. It doesn't work as well as people were hoping, and it's a solution in search of a problem with limited application and it seems little monetization. The above article sums it up better from the big tech company's perspective.
Some of the comments below are part of the explanation why. It doesn't work as well as people were hoping, and it's a solution in search of a problem with limited application and it seems little monetization. The above article sums it up better from the big tech company's perspective.