I posted a question on Server Fault which a moderator put on hold for the following reason:
Questions on Server Fault must be about managing information technology systems in a business environment. Home and end-user computing questions may be asked on Super User, and questions about development, testing and development tools may be asked on Stack Overflow. – Sven
Why do moderators with enough reputation put on hold rather than migrate to what they think is the correct site?
Additionally, why can't users move their own questions?