How is sub-ohm becoming less descriptive? If the resistance is below one ohm, it's always going to be sub-ohm. The advances in technology do not change that simple fact. Plain and simple. Car tech has changed dramaticly since it's invention but it's still a car. Or perhaps you would like to call it a mobility aparatus.
The term subohm has historically meant subohm *mech* vaping which implies other variables, most importantly wattage and coil mass. With the advent of devices that can control power independently of load resistance in the <1 ohm range, these other variables are no longer represented by the term "subohm." So whereas before it inherently described a whole "style" of vaping, it no longer does.