I'm going to ignore the monthly internet/mobile bill, because music streaming is a fraction of what it's used for.
Cassettes records, and the equipment used to listen to them eventually wear out, so you'll have to rebuy them at some point (or limit how often you listen to them).
My phone is much more portable than a cassette, record, or CD player.
Well, they're kind of related. You won't be able to if Spotify terminates your account for whatever reason (which happened to me once, due to claims on their end the payment ran into some issue, which I could never verify) or if it goes out of business.
You can also rip your CDs so that the music is no longer tied to the physical media.
Are you counting only the things you listen to for the first time each month? Because once you buy it, you don't need to buy it again.
> Cassettes records, and the equipment used to listen to them eventually wear out, so you'll have to rebuy them at some point (or limit how often you listen to them).
Sure, though purchased music that you can (both legally and practically) make lossless digital copies of to insure against that is very much a thing. Heck, some of the platforms offering all-you-can-eat streaming arrangements with their catalog also let you sync and stream your owned-music collection, and will even sell you DRM-free, copyable music, so that you don't need to rebuy or limit listening.
If you are willing to spend it you can buy second hand CDs or vinyls for less the 10 dollars at the record store, and they usually have a good enough selection such that you can most likely pick up that record you never found in the thrift store.
I only buy new music from newer artists (mostly from Bandcamp) and yet a CD is usually around $10-15 with vinyl maybe $5 more (+ shipping). But I take comfort that this money goes to supporting the artists, so it is worth it.
Usually I spend about $20-30 dollars on music a month (with some months spending more on expensive records). But with every new album I buy, it is added to my collection so I can listen to it again without needing to buy it again.
No, the math works out even if you're a less-than-average consumer or casual listener.
An album is at minimum $10. If you listen to more than one new album a month, you're coming out ahead if you use a streaming service. If Spotify shuts down, there's at least two other competitors in this space for me to go to. But none of them look like they're going anywhere.
> But with every new album I buy, it is added to my collection so I can listen to it again without needing to buy it again
Until the record wears out, or gets stolen, or breaks for a variety of reasons.
Also when buying new albums it is not unreasonable to expect the artist to get some money for their work. And its quite hard to reason that they do if they have to share your $10 subscription fee every month.