I’ve been living off a folder of mp3s for 30 years.
Same here. I love that shit. My mood is the algorithm. I still occasionally get new stuff, but from other sources I happen to see or hear, like a Netflix show that has it in the background or a musician's personal recommendation in an interview, and I go look it up manually. But even if I never got anything new, I already have more music than I could easily listen to in a lifetime that I already know I liked at least once.
I've tried streaming sources, but it never hits right. This way, where I am specifically picking the artist or album, it's always right, always fresh, and I'm always listening to something I want to hear.