I buy DVD's and BlueRays. I like to own the "Right to Use" the content. I like not to have to rely on a given provider to have a contract to to stream content in order to be able to watch to something. I will watch some shows and movies multiple times. So for a certain core set up media I want to own the media. All that crufty back catalogue of movies and shows that is no longer available on streaming services, mine to see at any time of my choosing.
I even ( GASP ) buy actual books from time to time, it seems as though there is SOME content not yet kindlified, that may in fact never be on those platforms.
The streaming / sharing / caring economy will eventually strip you of any remaining un-curated choice in what you read, watch, or listen to.
Seems as though there is some music not published the day before yesterday thats worth listening to. So yes I own many hundreds of CD's as well.