Juve in Italy is like Man United here but 5 times worse and has been that way since the 20s and 30s thanks to FIAT bankrolling the club back then. They always get good away followings more or less due to the fact that everywhere they go they have huge local support.
Ridiculous when you see clubs like Bari at the other end of the country have easily their best attendances for years when they play Juve at home. They averaged 20k when they were in Serie A but got 45k when Juve came.
Agree on large away ends looking awesome but its not as impressive as a proper pilgrimage of local fans.