They're still big in classical music. And, yes, classical music is still a thing too! ;-)
Jazz too, because of the older audience still buying physical goods.
Worship music as well (think churches).
I was kind of thinking the same thing, the last time I had a computer or laptop with an optical drive must have been something like 8+ years ago and even then I can't remember using it for years.
No, hipsters are only just upgrading to tapes.
Heh, first thing that sprung to mind was what.tape, I hear it's the new big thing. Seriously though - there's no good reason for anyone to embrace standard cassette tapes, vinyl I understand - not because of any audio quality based arguments which are easily debunked but because the large format tactile experience of the physical and visual experience of the playing a large rotating medium with friends can be quite compelling. </endtangent>