I guess the crux is that "important" is relative. JIT compilers (especially hot-spot optimizing ones) are most commonly used for high-level languages like JavaS

I guess the crux is that "important" is relative. JIT compilers (especially hot-spot optimizing ones) are most commonly used for high-level languages like JavaScript, which have a different definition of "important to performance" than eg. systems languages. The OP is talking about compilers that produce binaries, so I think the relevant definition of "important" is that of systems languages, not of the typical JITed language