Agreed that starting with their own content makes sense. As for the difficulty of adding existing AD assets, I'm unclear as to why this is any more difficult than adding more language tracks, something Netflix has been doing for years. As for procedural and contractual issues, advocates in the past have gone so far as to get the owners of the assets to agree to license to Netflix free of charge, to no avail.

It's sad that in the UK, VOD services are even further behind on accessibility. I do hope that Netflix is actively seeking out AD, but given their track record so far, I'll believe it when I see it.

Most of all though, I wanted to respond to one particular thing you said: "And for all the stick they get, Netflix actually leads the way in accessible content"

The lesson I've taken from this is that they don't get nearly enough, or perhaps the right kind of, stick. Advocates (and legislators in some countries) have been after Netflix on this issue for years, but what finally seems to have gotten Netflix to take action was when the mainstream media started picking up on the story. That action was swift and completely addressed the story that the media told. I therefore think it important to keep the story going in an attempt to ensure that Netflix keeps working on this problem.