Sign Protocol's Sovereign Chain is built on a powerful idea. Governments control the sequencer, meaning every citizen transaction gets ordered and batched before reaching the validator set. That is real digital sovereignty on paper.
But here is what nobody is talking about. The whitepaper says "exit to L1 if L2 experiences issues" when the sequencer goes offline. That is the entire failure plan. Who triggers the exit? Not specified. What is the recovery window? Not specified. Is there a fallback sequencer? Not specified.
For infrastructure that governments and citizens depend on daily, three unanswered questions is not a small gap. It is the whole plan missing.