My impression is that with „smart“ playlists in 2024 the border between Roon Radio and smart playlists becomes blurry at least in the mind of many users, and so I think the recent feedback for what users expect from radio may also be helpful, starting here:
There may be value in having some sharper distinction, such as SPL being based on focus filters and radio being more driven by algorithms or AI. But even then one could imagine a combination like the user choosing an SPL from, e.g., a genre and period (which can be thousands of tracks) and then wanting AI to choose from this general framework based on a theme, mood, desired length of the PL, etc.
Maybe that’s all pie in the sky but I think it’s approximately what the name „smart“ conjures up in many people’s minds