This is an incredibly narrow view of the vast number of reasons people choose to play X, Y, or Z bass.People who want to play a four want one of two things: a nice snappy standard bass (possibly even piccolo) OR they want to a tight low end while they tune down.
If you intend your basses to appeal to the lower register tunings that are popular atm you're going to want to go w/ a multiscale, where as if you want to appeal to standard 4 players or piccolo players go w/ a smaller scale length such as 33"
