iOS, MacOS, etc. 26 is making me seriously consider switching

You answered your own question. The music streaming services have been including "you might also like" artists for a while now.
I can see that (kind of) when I am searching for music or looking for suggestions based on my listening habits, but this is in my music library -- stuff I "own." If I click on an artist, I only want to see that artist's work.

I've started on path to reduce the amount of Apple in my life. I realize I probably cannot eliminate it completely, especially without switching to an even worse user experience in many cases, but I am less and less enamored with what I am getting from Apple for my money these days. I go out of my way to avoid vendor lock-in at work. I thought the benefits outweighed the risks with Apple in personal life, but it is becoming clear that may no longer be the case, so I am going to start reducing my exposure. I am currently using a Dell running Linux at work, and I've been playing around with other streaming devices.