There's a case too for this for a couple of decades. Really before music distribution completely changed. I think genres today and are so mushed together that it really starts to feels like there are absolutely no limits on genre whatsoever. To point where it all starts to just feels like it's just a slurry of genres with no delienation whatsoever. wanna make free jazz trap beats with hints of opera and black metal riffs and background covals? Go ahead! Hell, it probably already exists.
Problem is, anything that mixes free jazz, trap beats, hints of opera and black metal riffs is unlikely to do any of those particularly well