Regarding Netflix, here's a big usage of theirs, which is the Extstore (external flash storage) the Github page refers to. They probably use it beyond this, but it's a good technical article to sink your teeth into.
https://netflixtechblog.com/evolution-of-application-data-ca...
> Boring Tech is Good
It's fine if all you are doing is boring things.
But often there are use cases where a simple key/value store just isn't going to cut it.
And I for one am glad to have Redis as a solid, well-engineered alternative.
Boring Tech is Good. Memcached should be added to that list.
Edit: Release Note Mentioned Netflix, I wonder what they use it for.