That's the way all of the bottom vertical coils I own are built, and I agree that this design extends the amount of liquid the unit can vaporize during its useful life.There is a coil that fairs well to last long. thou not many fans of this style coil. That would be Kangertech's Juppi.... This coil ( and its wicking ways ) has been one of my many favorites.
With a light torching, and new band of top shelf cotton, this is, IMO, a taste & cloud pleaser...
One big concept I like about this coil is: The cotton is wrapped around the coil, and not directly in the path of intake,,..
This tank has never given a dry hit. And the juice flavor gets a high score.
A big plus for DIY Juicers, ( You can easily add a drop of flavoring to the tank when looking for a key flavor. ) I've used RDA's to try new juice flavors, but it never worked as well as the Juppi.
Again, coil life is not measured by any unit of time. It's measured by how much liquid it can do.
I have a three year old Smok Aro coil. It's still alive because it has vaped about 5ml of juice since I bought it.