Hi there.
Regarding Blue Noise Dithering @LordOdin just found a paper dated in 2019 and it looks pretty amazing, it could accelerate rendering quite a lot, our current implementation already helps, but this could make a big difference in render times I think, here is the paper, I will mention the main people involved in cycles I know about to know what you think, @brecht @lukasstockner97 @StefanW
EDIT: Fixed the link
Link, to your own post a different forum where you link the slides that talk about the paper,riiiight… i’ll save everyone a few clicks and link it directly
Paper:
https://drive.google.com/file/d/1znhbmKGeHphfae1tz3YnroOzOA5-sYcd/view
Slides:
No no, in the other forum I show to David (the LuxCore developer) the current implementation of Blue Noise Dithering, the same that we have right now as a patch for cycles, the one from Lukas Stockner 
the paper I mention here is a new one, a different implementation.
However I posted the same link to this new paper in the other forum too, yep
EDIT: Sorry, I understand now… LOL! I wanted to post the link to the slides… not to the forum!!! hahaha fixing it
The interesting bit to keep in mind starts on page 57 I think. This is where they talk about the theory vs. their actual implementation.
I want to say that all the pretty pictures they used in the first few slides were their theory, and not the result of the actual implementation that they suggest. This sours things a bit.
That said, their conclusion on page 56 still stands.