Personally, I have little interest in typing a text prompt and getting a complete song as an output. However, I will gladly pay serious money for a tool that interactively collaborates with me in a granular, iterative process of generating, adjusting and mixing individual instruments and sections toward a finished multi-track song project. Allow users to creatively engage by providing suggested starting places in the…
So then there's the casual end-user who's making music for themselves to listen to. IMO this is largely a novelty that hasn't worked out. I haven't heard many people regularly listen to Suno because, again, music is already incredibly cheap. Spotify is ~$15/month and it gives you access to the Beatles and Rolling Stones. The novelty of AI-generated "Korean goa psytrance 2-step" is fun for a bit, but how much will people pay for it, how many, and for how long?
I do think there's a lot of potential targeting musicians who incorporate AI-generated elements in their songs. (Disclaimer: I am a musician who has been using vocal synths for many years, and have started incorporating AI-generated samples into my workflows.) However as you point out, the functionality needed for Suno to work here is very different from the "write prompt, get fully complete song" use case.
It'll be interesting to see where it goes from here. In general, AI-based tooling does appear to be pivoting more towards "tools for creators" rather than "magic button that produces content", so I'm hopeful.
[0] One notable one is the artist "009 Sound System", who had a bunch of CC-licensed tracks that became popular due to YouTube's music swapping feature; since the list was sorted alphabetically, their tracks ended up getting used in a ton of videos and gaining popularity. https://en.wikipedia.org/wiki/Alexander_Perls#YouTube