I wasn't one. But as I read the arguments for/against an in-car system, it seems to sense that the probability of an erroneous reading/component failure that results in a catastrophic incident is far higher with multiple distributed (in-car) systems vs a single track-owned/managed system? I *think* my logic is directionally correct, but can't conjure up the math....
I'm thinking it would be a lot easier to bullet-proof 10 lights at a track (in terms of operational capability, routine maintenance, etc) than to police/enforce that over the 300 competitors at a given weekend. And the next weekend at that same track, it isn't the same 300 competitors, so there is even less integrity to previous preventative efforts as a season goes on.
And what do we do with the driver who states that his dash didn't alert him to the yellow flag (whether it did or didn't)? Do we audit his in-car system to prove it alerted him and he was at fault? All this seems terrifically complicated to me....
cheers,
bt