Staying a year abroad is an idea that not everybody likes. In my opinion and for many reasons this is a very good idea and everybody should at least think about it.
Fistly and the main reason is that changing completely your enviroment and starting from zero is always a good experience. In the same way you learn how to look after yourself and do new things you probably weren't used to do before, for example doing the laundry, washing up, cooking... In addition you make new friends and you get to know new people, cultures, places and maybe even languages which is always good for you.
For all these ideas I draw the conclusion that all the students should spend at least one year abroad for their academic and cultural learning.