No preamp 'Balance' control?

I do have a preamp, designed by Ben Duncan and built by Audio Synthesis, that has a remote and uses an optical system to change balance between the channels but I have never used this feature. I just this minute realized that the preamp I currently use, an Audio Synthesis Passion Ultimate passive, also has the same system [using only one resistor total in the preamp] and also has a balance adjustment. I had totally forgotten about it. So it is either totally unnecessary or absolutely essential, you pays your money and makes your choice.

Cary SLP Pre's have a master volume, and a right and a left balance potentiometer for great flexability, but I usually run the L and R wide open then adjust the master volume.

Late comment.  Many of us have a slight hearing loss in one ear.  Mine is about 2db.  Just can not imagine listening to my tube gear without the sound centered.  An off center image takes away from the experience big time.

Good point sssperf.
I, too, have a bit of hearing loss as well as an asymmetric listening position in my office, so a balance or gain control is a necessity.
B

Never used balance on earlier preamps.... don't miss not having it on my current pre