It’s been six days since Elon Musk took ownership of Twitter, and the changes have been both furious and fast. He’s proposed cataclysmic layoffs — somewhere between 50 percent and 75 percent of the company’s staff, depending on which reports bear out. He’s established an entirely new user tier, in which users will pay $8 a month (formerly $20) to receive algorithm boosts and the prestige of verification. He’s also proposed a paywall feature for videos and there are rumors of a…