I feel like the world would be better if some nation(s) were legislatively stream-lined for experiments in secession (perhaps with trial periods and other condi

I feel like the world would be better if some nation(s) were legislatively stream-lined for experiments in secession (perhaps with trial periods and other conditions). Would allow for governance innovation without the calamity of conflict that's required for carving out space today. EDIT: Perhaps it could involve a hypothesis of sorts before secession, with baked-in options to re-join the parent state if the parent considers adopting some learnings after a successful experiment. Lots of possibilities. Would likely involve re-gearing the concepts of how quasi-independent states (child + parent) would keep relations open, so as not to polarize populations unnecessarily. I don't normally think of diplomacy as exciting, but learning how to make such a system work effectively would be pretty interesting