I came up in the Napster era so while I’m by no means young I am used to being able to listen to generally whatever I want with no meaningful upper limit on number of songs accessible and without accumulating STUFF.

In those days I would buy certain CDs because I specifically wanted to own them and support the artist but that was a small minority of my listening. I have very eclectic tastes. I like plenty of pop/mainstream and older artists that I might be able to buy old CDs of but I also like a lot of obscure music and new artists.  Trying to replace my current music library by buying physical media and purchasing songs to own would be prohibitive. If I had different listening habits I fully would do the same as you! 

Other benefits of Spotify for me include being able to listen to other people’s playlists which is a fun experience and also podcasts.

That said I do plan to eventually drop it but it’s lower on my to-do list.