I remember streaming internet radio (somafm) and trying out different skins on my windows xp laptop back in the early 2000’s and just feeling like the cyberpunk future had arrived.

SomaFM is still around.

It looks like Qmmp can use WinAMP skins.

Apparently archive.org has a library of WinAMP skins.

Milkdrop was my gateway drug.

That was reimplemented as projectM, and there’s apparently a Qmmp plugin.