Clearly you have never actually used a WebOS device. They supported app sideloading out of the box and were easy to get root on via an officially supported method. There was an extremely popular third-party app store called Preware that offered all sorts of apps and OS tweaks.
When I was a little kid I "jailbroke" my palm pre, and had all kinds of cool tweaks and apps loaded. I wish I could remember the name of this funny little MS-paint style RPG... WebOS was a great OS, shame what happened to it.
