Netflix never wanted to do DRM. They fought the studios and tried to teach them for years that it was pointless. Eventually they had to relent because the studios had more power than they do.
To answer the follow up question -- the Netflix originals have DRM because they aren't made by Netflix, they are still made by regular Hollywood studios that demand DRM. And for the few where Netflix has control, it's easier technology-wise to just put DRM on everything instead of littering the code with exceptions for some content.
At the end of the day, DRM for rented content isn't so bad. You're renting it. You shouldn't have control over it.
I still don't like DRM on content I'm buying.
