Laziness is competitive advantage. There are costs to it though - in this case, we pay for it with our data. Small bits of our souls, if you will.
I don't expect these technologies to appeal to people who think of the data their behavior generates as "small bits of their souls."
For everyone else though, there are some neat families of features in all the major tech stacks.
I guess that's what kills it as practical in the real world.