I remember reading an anecdote that half of the development costs of the Cray-1 were actually for the Cray FORTRAN compiler.
Btw, Nvidia is still looking for more flang developers: https://nvidia.wd5.myworkdayjobs.com/en-US/NVIDIAExternalCareerSite/job/Senior-HPC-Compiler-Engineer---Flang_JR1976498-1