I personally kind of like the loose ball type.
It's more of a thing where I'm in control of my BB and can service/adjust it to my hearts content. Something to occupy me when the weathers too bad to ride.
However, I had to swap cranks on my bike and I simply couldn't find a short enough spindle for the new cranks. At least nothing for a budget minded person.
So now I'm a "cartridge" person.
I flip bikes on CL and I think it's a selling point to say NEW BEARINGS when it only costs about $1 to install them.
So, I'd say a major disadvantage is the lack of different size replacement spindles in the shorter lengths.