Old-style armored cable (Type AC) is still made and widely distributed. Why is this, given that type MC cable is more versatile (more conductor configurations, more Code-permitted applications) than type AC cable by far, and the new type MCI-A products coming out eliminate any edge AC may have had in termination labor? I'd have thought type AC would be utterly obsolete now, replaced in all new work and rework by type MC. Are there applications where AC can be used but MC (especially MCI-A) can't?
(For those who haven't kept up -- MCI-A is a type of MC cable that uses a bonding means consisting of a full sized aluminum ground wire integral with the corrugated, spiral wrapped armor, usually aluminum as well. It is available through multiple manufacturers -- Encore calls it SmartGround or MC-SG, Atkore/AFC calls it MC-Quik, and Southwire calls it MCAP.)