Bedroom music is individual. Bands need clubs and spaces to practice outside the home. Probably why we're seeing tons of solo artists and fewer bands break it. Perhaps I'm just not following, but I think the medium of YouTube and Soundcloud has led to that as well.
Favors the independent producer/songwriter. Largely females, as they're generally the ones whose muse is loneliness in a bedroom or musing about the day there. No accident the big TikTok/Soundcloud stars are people like Billie Eilish/Lorde, or the Lily Allens of MySpace lore. See, e.g., the females mentioned here. But also rappers on the male side. Regardless, pretty singular stuff. The collaborators need space to practice and hone, bounce ideas off of others in the immediate vicinity, and they don't seem to be getting it with the skyrocketing of city rents and the like. Seems to be very few talked about scenes, more bedroom stuff.
That sort of music is nice, but I think the mediums through which music is encouraged lacks a "take the world" mentality many rock and hip hop groups and troupes developed via touring, gathering, getting together, etc. Less of those spaces around these days, it seems. And it seems the "take the world" mentality is frowned upon as a normative judgment within art, with the zeitgeist stuffed with more democratic, less bombastic, artists.
That's just me spitballing, but usually in the past, you'd hear of scenes, bands, etc. Now it's singer/songwriters and the like. Which might be nice if one has something to say, but I've seen a bunch of music that doesn't. Lorde certainly being an exception to that rule.