Industrial plugs and sockets are all high grade fire retardant plastics that can take quite a lot of abuse.
I don't see why the same can't be used in domestic situations. There is no real reason to continue with these old fashioned hard plastics.
I've seen cracked schuko sockets in use in Holland too. You can still buy hard plastic rewirable schuko plugs here in Ireland although the CEE 7/7 style ones seem to be softer plastic.
