Do you keep old raw files and for how long?

Wanted to poise this question because I noticed today as I was moving files around that I have a massive folder of old raw files. I started keeping them last year because there were a few instances where I wanted to go back and redo an edit or adjust colors on a photo. Nowadays I almost never do this since my editing has improved and I'm generally happy with photos the first time around. So for the sake of space I wanted to hear what this community does with their raws and poise a couple of questions:

1. As above, do you keep raw files and for how long if you do? 2. What is your method for storing/choosing raws to keep? Is it all photos or just the ones you found to be exceptional? 3. Do you store your raws with edits or just the raw itself?

Any discussion or comments on the matter is appreciated, would love to hear a professional weigh in since I'm just a hobbyist on the matter.