I did enjoy this comment:

C code with a test suite that is run through valgrind is more trustworthy than any Rust app written by some confused n00b who thinks that writing it in Rust was actually a competitive advantage. The C tooling for profiling and checking for memory errors is the best in the business, nothing else like it.

In other words, a small subset of C code is more trustworthy than Rust code written by "some confused n00b". Which I would argue is quite the feather in Rust's cap