Agreed to some extent, but I don't think you'll have too long to wait before that comes to pass. It can't possibly be that hard to build a model that will disassemble a given song into its original tracks, like a Fourier transform that yields drums, strings, keyboards, and vocals rather than sines and cosines. Equally unlikely that such a model will be too large to run locally.

We will get some very cool tools -- and some very cool remixes - when that happens.

https://github.com/deezer/spleeter

https://github.com/facebookresearch/demucs

This is called "stem separation"

It was added to FL studio in 2023 and I don't think they were the first to do it.