To me RHCP has always been a nice enough band. I feel about them like I feel about lots of those rock bands that still keep it strong.
But it's Frusciantes solo stuff that is really special. I've tried searching high and low, but there are some brilliant articles about him, from right around when The Empyrean was released. That album still is
an experience.
I am addicted to this old song he made back in the day; https://www.youtube.com/watch?v=scT-ImWYZyc
He also did this amazing radio interview some years ago, but its lost in all the other ones. He talks about how he got so good, on letting go and moving on from the drug addiction that was so close to killing him. Even by rockstar standards, I am surprised he made it at all.