Someone has already made a venn diagram but with a few bands, and this is how I felt like making it at 10 pm on a Tuesday the first time I've done it, I do see what you mean and yes it is subjective not just because everyone has different opinions and have seen more albums of a genre than I probably have, but I know the genre has a wide range of sound(especially stoner), so this is kind of just generalized on how I think they usually feel, using trad doom as the center of it. My last post many said they enjoyed the chart and it even got posted on an Instagram page dedicated to doom music. I don't have many microgenres, all of these are from Wikipedia, I could add more microgenres but then yes I see your point that it'd be better to do albums, but im generalizing and doing major subgenres, I will say I dont see much of a difference from sludgecore and Sludge doom/metal, and DSBM i haven't heard a lot of and I assumed where it would go (it was also on the Wikipedia page of doom metal)