I like to own the music I really like and collect it. I use streaming for discovering new music and find related music to what I have but I don’t need to own all the music I find by streaming, some of it is just nice to have heard once (or once in a while).
Nowadays everything seems to be about streaming, renting, subscriptions for software and now even games but there are still a lot of people who prefer to own their music, movies, software and games instead of renting them. Compare it to a library: why have people ever bought books if you could borrow them from the library?
Also, it may be handy to have music stored offline on your phone or media player so you don’t have data usage to play your music if your mobile internet subscription is limited. In some countries that is even true for home internet.
But for me I simply like to own my stuff and I make sure I have a bunch of backups of it. How many times have I not had that an app I use on my Mac or iPhone isn’t available anymore but I still have it. And the heaps of old games I have you can’t find in any subscription.
In the end subscriptions cost more than owning something which is why I immediately chose Roon lifetime instead of yearly payments for example.