Also, depends what's meant by "federal" - an actually federal system, ie one that retains some obvious traits of being a federation rather than a country, is a bad idea for any sort of country.
In case anybody didn't get it the first time... an actually federal system means that the member state
executives have at least
some de facto and de jure say on central decisions.
And yes, that is true in Germany.
Ie, Al and me are off on the same tangent. (Except he also used the very British term "Devolution" for places outside Britain. Something I'd never dream of doing. "Regionalization" or "Decentralisation" are better terms for that. And even they don't describe the US or Swiss cases accurately.)