Google cannot learn that kind of lesson, the people who were in Google+ are probably long gone from Google for greener pastures most likely. Second, google is an amorphous giant with no other goals than increase market share, no wonder their products are terrible. But still, with all this in mind, we should remember that great things go come from google, it's just that they're not capable of capitalizing on them.
insightful comment. I'd like to think that Google will integrate AI in an at least mostly useful way, but it's clear that large scale reorgs like this around chasing a competitor can and do end badly.