Unless things have changed, a Linux machine will not give you a high bit rate picture. Netflix requires DRM and will only give you 720p.

So you get freedom, but a worse product. Which is a trade off not all would be willing to make.

There are also few major streaming services which require elevated levels of DRM , preventing them from being used on Linux.

I've not had any issues with any streaming service not working on Linux. Disney+, Netflix, Prime Video, Shutter all work fine for me. If it can be streamed in a browser, on any OS, it works on Linux. Typically your browser just needs to have Widevine installed.

As for Netflix quality, I've not noticed any quality issues at 1080p but I've not measured the stream to confirm if that's what they're actually streaming.