*well i dont think sleep status is useless at all

but i dont use it mush myself,im a direct attack kinda guy so status effects are not a priority
*but there are some encounters that sleep can really aid you,for instance, killing a T-Rexaur in FFVIII,if every character is junctioned with sleep attack the Trexaur is unable to do less or no damage at all,and we all know that this motha is one bad ass dude!

so it was a great help in leveling and collecting items from the monster
