Regardless of terminology, you’re breaking rules set by someone else and doing something because you feel entitled to do it. Even if the original file doesn’t change you’re taking possession of something you don’t have the right to possess.
Go nuts. It doesn’t fundamentally matter at all. But don’t try to loophole your way out of a situation that is very clear.
But fundamentally you and I both know that Spotify has made rules that say you can’t write a script to download all the songs as MP3s or OGGs or whatever.
If you want to break those rules, go nuts. But don’t hide behind terminology. You’re taking something somebody else doesn’t want you to have because you feel like you’re entitled to it.
Just fucking own it.
If you think that's immoral or should be illegal, it's a separate discussion. The point here is that for that discussion to be had the distinction needs to be made.
You are taking possession of something you don’t have rights from the original owner to possess. This is true even when the original thing remains unchanged.
Again, I’m not interested in debating the definition of theft/piracy/copying/whatever. It’s a very tired argument made by people who want to validate their decisions and actions.
Just say, “I don’t care. I’ve talked myself into thinking there’s no issue with me doing this so I’m going to do it.” The lengths people will go to argue the semantics of this shows me how clear the issue really is.