First presented in 2014/2015, to the best of my knowledge.

Guess that means it's been at least a decade now, that it's strange it hasn't been much public discussion of this sort of use.

The article's snippet from Yann LeCun is somewhat perplexing to me. There's no way he hasn't been aware of the possibility, and I have a hard time believing it's been beyond the means of Facebook's R&D division to implement it.