- using one RPI running as a cheap desktop/internet/YouTube computer in a living room, because I don't want to accept the "Terms and Conditions" on my TV regarding automatically sending all my usage data to the internet - using another one to regularly backup all my data - using another two for undisclosed projects - planning to use another one as a Subversion repository server to store all my company documents which I share with my wife who is not a programmer but has learned to use Subversion (which BTW is better to store large binary documents than GIT) - etc.