If it's not a sitcom, I'd rather have FullHD quality (which is between 1 and 5 GB / hour for h265/264). And streaming is strictly inferior to downloading, as long as your bandwidth is good enough (since you can start watching while you download).

For me it's either watching something on a 13" laptop, where 720p quality is sufficient and torrenting is just too much hassle, or having a "serious" cinematic experience on a 75" 4k HDR panel, where you want to have the best available quality (i.e. 4k BR rip with minimal compression). So Netflix just isn't very attractive, especially if it does not have some of the movies I want to watch.

I just recently upgraded to a 1920x1080 101 cm flat screen TV - I'll consider upgrading to UHD-1 HDR when more content is available - most of it seems to be upscaled 2k, and when I tried to buy Planet Earth 2, they didn't even have it in stock ! (Not to mention that I would have had to buy an Xbox just to play it...)

Depends on what you consider full HD. Sure, if you're getting something from a streaming site you'll be lucky to get 5 GB/hr. But from a high quality source like a Bluray I would say 6 GB / hr is about the absolute minimum (for a crappy old transfer), and over 15 GB / hr would not be unheard of.

Well yes, "good enough" is very subjective.