Very first Super Bowl was in the LA Coliseum. Not a domed stadium! First game under a roof was 1978 at the Superdome.
Remember watching that game on a small b&w tv set in the frat house basement.
IIRC it wasn’t a sellout either, and the hype factor was probably about 0.1% of the current.
“Not a domed stadium!”
True, but also not a cold weather venue. I don’t know why they didn’t put a roof, or maybe a retractable roof, on the new Giants/Jets stadium.