People do this:
https://news.ycombinator.com/item?id=44294402
So they use Firefox 99% of the time and then if they encounter the rare thing that requires DRM they treat it like toxic waste that has to run in an isolated sandbox, which doesn't need to be the same browser they use for anything else.
The only other sensible option is to get out the reversing toolkit and break the DRM.
There is absolutely no way I would be able to convince my parents to do streaming that way, and I'm reasonably certain that they're a much more representative set of the community than people who hang around HN.
It's unlikely we can extrapolate market share and user-base data from individuals who self-select into discussing DRM on Hackernews.