Netflix is case of "nothing succeeds like success". We have at work a lot of Netflix libraries, frameworks etc which are in deprecated / half-assed state waiting to be replaced for years. It all works for Netflix because they can spend ton of money , resources and people and make even dubious shit work.

I think it will remain fine for Netflix in any case keep or replace. But companies who keep using Netflix OSS, or architecture ideas only because Netflix is so cool are going to have worse outcomes. Case in point is Micro services revolution which is almost invented and promoted by Netflix.