The only problem I think we'd have is finding Coders qualified to replace the core devs. The software runs whether they are actively coding now or not.
Maybe we should require 51% of the core devs to manually wall burn a warrant canary that publishes a different "GOOD TO GO" style message every month. If the message is always slightly different, then we know that it was manually published and not some batch file. If it's multisig, we could stop the gov from tampering with those wall burns too. Secret subpoenas wouldn't be such a threat and we would be a lot more agile to such attacks.