One of the things that you can do with D and as far as I know Julia is enable specific optimizations locally e.g. allow FMAs here and there, not globally.
fast-math is one of the dumbest things we have as an industry IMO.
Totally agreed. In Julia we use https://github.com/SciML/MuladdMacro.jl all over the place so that way it's contextual and does not bleed into other functions. fast-math changing everything is just... dangerous.