In the states everything under the NEC is TN-S (its mandatory) but when you get to utilities TN-C is used because of capitol economy.
Well not quite, up to the main panel it's technically TN-C so the whole system is TN-C-S. And until recently range and dryer circuits were entirely TN-C if I'm not mistaken.
I think Sweden historically had a mix of TT and TN-C but generally favoured isolated rooms in homes (in a room without earth potential even touching a live wire can't create a dangerous current flow). Isolated room systems typically use 2-pin outlets and class 0 or class 2 equipment. Class 1 is safe as well as class 1 without earth connection is just class 0.
These days it's nearly impossible to create a room without earth potential with metal air ducts, central heating pipes in case of hot water heat, antenna wire shields, network cable shields etc. etc.
