Heavenly Days!
Each plug would have to arc of course - but this seems to me like the old air gap principle put to an absurd limit.
One popular ignition does have an air gap in the cap ( seen it) and it works very well - (DA)
so the system does have merit---
I tested a 4 plug 3W /dual ignition twin -- which as I recall used one senser--
The engine was , in my book. rather anemic. tho the ignition in something which really gobbles fuel could really help thing go ---
like a rail?