It also limits lead exposure at minimal cost. Almost all airborne lead (something like 95 to 98%) is generate when the base of the bullet is vaporized by hot powder. It's amazing how much cleaner the weapon is overall compared to a conventional FMJ.
For those of us using ported or compensated guns, it keeps the ports clean as well.
I also shoot a lot of steel targets and the softer plated bullets are destroyed more thoroughly than jacketed projectiles.
I shoot plated bullets outdoors and clean the cases in a sonic cleaner, which eleminates the majority of lead contamination in shooting, cleaning and reloading ammo. Once lead-free primers become more reliable and more readily available, then I'll probably switch to those, too.