I suspect lifetimes get you the vast majority of the benefit of immutable data for UI purposes, tbh. It lets you ensure that references aren't retained or acce

I suspect lifetimes get you the vast majority of the benefit of immutable data for UI purposes, tbh. It lets you ensure that references aren't retained or accessed at the wrong time, unless they provide an explicit way to bypass that (i.e. the defaults for data types is safe).