Both have their places. If you only use screws, you must choose the type that are tough not brittle. And preferably use design where screws do not get stressed sideways (although this goes for nails also).
When using nails, galvanized ones hold much better, although they cost double so probably not used in Germany or Scotland (based on this thread...)
There have been several accidents here in Finland, to the point that relevant government agency published a warning in the end of last year. Wooden structures, including highseats, had been disintegrating (in lack of better word) due to indoor screws being used. Sometimes even with treated wood (that eats up regular screws). They contribute this to lack of information at point of sale, but I guess in most cases people would anyway buy the cheaper screws (and not look at info). And also buy too thin screws.