There are so many programs written in C or C++, but not in any of the languages you cite, that run just fine in Fil-C.

The thing that is interesting about Fil-C isn’t that it’s a garbage collected language. It’s that it’s just C and C++ but with all of the safety of any other memory safe language so you can have a memory safe Linux userland.

Also, Fil-C isn’t anything like ASAN. ASAN isn’t memory safe. Fil-C is.