the failure isn't an issue, they will just shut down like random websites and games do all over the internet daily. In the future, most users won't even realise they are on steem, especially through an SMT interface.

When it comes to the confusion, later on they won't be entering through Steemit.com like many do now, they will come in through niche specific interfaces that they will feel at home at. They might spread out from there if curious or, not. When it comes to the wallet, that travels and the keen users will explore.