B drive?

As far as I understand it B drive was usually for the 5.12" disk (those were the days). So now that has gone extinct, why is B drive still reserved?

I have never tried to reassign drive name to B drive though. Maybe I should reassign my CD drive to B drive

I'm not so certain about the "less reliable" bit.

I have had so many 3.5" disks fail on me it isn't funny. 5.25" also developed bad sectors, but at a far lower rate than the 3.5" ones. The plastic case on the 3.5" seemed to do diddly.

I'd be very surprised if 3.5" disks had a lower error/byte ratio than 5.25".