I wonder if anyone has bothered to look into the mathematics of #recommendersystems , because it is really embarrassing that papers with with 0000s of citations end up mapping to some very banal conventional #statistical models.
OTH, the latter have missed tremendous opportunities to entrench themselves (and create job opportunities for statisticians) by forgetting special cases that powered applications before the era of cheap computing that started in the 1980s.
It is #pagerank all over again