electromagnetic projectile launchers require power and lots of space for batteries
nuclear aircraft carriers have power and lots of space
they don't fight directly though, so they don't need a rail gun
"then how would they use that tech?" you might ask
well, what do that launch? hurm... aircraft. duh.
they've been using steam catapults since World War forever ago and that shit is archaic. steam? c'mon. who the fuck are we, Queen Victoria?
America, being #1 at aircraft carriers, already has a design in the works
it'll launch the jet at a hundred knots or so
boring. we need to Tool Time that shit and add more power
there isn't a single disadvantage to launching a fighter at mach speeds
i dare you to post one