Joni Mitchell didn’t really need to be a rock and roller for the rest of her life if she didn’t want to. Her entire sound was based around making the best tunes that she could, and she never wanted to get bogged down writing the same kind of formula that everyone else was used to. It made a lot more sense for her to switch things up on every record she made, but she was always pissed to be at arm’s length from the rest of the contemporaries in h…