Originally Posted by
OskiBear
It's not ideal if for nothing than the inconvenience of a single aisle being used for passengers and crew to access lavs and galleys.
However, growing up, we used to fly TPAC and hop across the ocean on 707s before 747s were commonly deployed on those routes.
B707's have the same cross section as a current B737. DC8's about the same.
Until 1969 when the B747, was introduced, most long haul was in what today would be considered
"narrow body" . Passengers of the day survived to see the sun rise the next day. Much ado about nothing
Edit
https://en.wikipedia.org/wiki/Narrow-body_aircraft