That's true for COBOL too.
FORTRAN compilers were great for loop optimizations, but not clear if it pioneered much else worthwhile.
Re:Jean Sammet, co-creator of COBOL, has died
by willtim on Sunday June 04, 2017 @04:01PM
(#14483213)
FORTRAN pioneered expressions which were used in addition to statements. This was huge. Modern languages are still expanding on the idea of programming with expressions (especially functional languages).
From my experience working on compilers, the thing Fortran begat the most was advanced compiler optimization algorithms, which then trickled down into C and C++.