The idea that you can group everyone into 2k+ cohorts of differing tastes sounds like a good way of attacking the problem (though it feels a bit like spaghetti sauce taken to the extreme https://ed.ted.com/lessons/malcolm-gladwell-on-spaghetti-sau...). Personally, though, I think IMDb score is way more predictive of my enjoyment than their recommendation engine has ever been. Nine times out of ten watching a show that is below an 8.0 is a complete waste of time for me - I'll hate it even if it comes up as a 99% match for me. Conversely, I'll watch a show totally out of my wheelhouse that I know nothing about (cf. The Grand Tour) if it's good television. I figured there would be a cohort of people who watch good things of any type but maybe not - maybe there is, I just haven't been placed in it for whatever reason.