No language other than C and FORTRAN have correct numerical libraries with a decent amount of speed. Would you like the next plane that will make you travel to

No language other than C and FORTRAN have correct numerical libraries with a decent amount of speed. Would you like the next plane that will make you travel to have the math done in javascript? Would you like your pacemaker to fry 17W/h for a V8 engine and do you need mozilla embedded in it ? Would you feel safe with nuclear plants control on the cloud? Does a space probe rather needs support for an oauth2.0 or correct numerical analysis? Don't you care that banking systems are correctly translating numerical amounts? I mean computer are used for critical purpose too. EDIT PS: numpy in python is binding on fortran libraries to do the job.