Plex is clearly doing some major spring cleaning, because it has just killed a handful more barely used features after shutting down its personal cloud streaming service in early September. The company has announced that it's sunsetting plugins, Cloud Sync and Watch Later. If you don't even recognize those features, we wouldn't be surprised -- that's pretty much the reason why Plex is killing them anyway. For instance: only 2 percent of its userbase uses plugins. That's why even though they provided users a way to tie third-party accounts with their Plex accounts, the company ultimately decided to lay them to rest.