I am a fan of the original potted coil that they marketed under the name of High Vibration. I do not think it is the same coil now, although the name remains. These things (coils, in general) do fail very rarely. Generally you do not get much notice. They are after all just many thousand wrappings of a single wire around a core. If and when that single fine wire fractures completely you stop in your tracks, if it cracks and cannot carry the necessary current you may experience rough running due to erratic secondary voltage before complete failure. Regardless, a coil failure is a very rare occurance.
Attached is the same original coil rebranded, take your pick. Notice no ring on the case, no metal can.
Engine Works Epoxy Hi-Vibration 60,000 Ignition Coil | eBay
ACCEL SuperStock Ignition Coil 8140HV High Vibration | eBay