This is a good analogy we like to use also. We also sometimes compare it to SMTP and Gmail. People used to run their own exchange servers, now it's easier to

This is a good analogy we like to use also. We also sometimes compare it to SMTP and Gmail. People used to run their own exchange servers, now it's easier to let a company worry about security and backups, and make it cloud based. This is the idea behind Coinbase.com