He'd still be alive ??
Um, one neat thing his proposed 'supergun' launcher could do is 'resupply'.
ISS /Freedom needs a new widget for the air purifier ?? Urgently ?? Okay, the spare can be made a bit tougher, because it won't cost a zillion per kilo to shuttle launch....
IIRC, he got into the rocket/gun business via 'sounding rockets'.
Bizarrely, the sheer visibility of such a gun may now make it 'safer' than equivalent rocket technology. Sure, you could build one in a mine-shaft or well-hole, but the hardware and sonic profile would be a give-away...
Too many people now think 'rocket' = SCUD = mobile = incoming...