Well, maybe like how people switched from ICQ to MSN to gTalk to Skype, or from Slashdot to Digg to Reddit to HN. Opening a user account on a competing website

Well, maybe like how people switched from ICQ to MSN to gTalk to Skype, or from Slashdot to Digg to Reddit to HN. Opening a user account on a competing website is much easier than changing OS or car engine.