I was watching a concert video of KoRn the other night and noticed that Munky's 7-string Ibanez Apex comes equipped with a tremolo system, but that he didn't have the trem arm installed, and (hence) never used it during the concert. In fact, in pretty much every photo I see of him, the trem arm is missing from the guitar. This suggests to me that he is, in reality, a stop-tail kinda guy.
So, why then seek out trem-equipped guitars if you never really expect to use the tremolo?
Because fine tuners are awesome.