> Of course assembly language has zero memory safety or other guarantees which probabilistically increases risk. I can't say if I think they balance out one way or the other.

I would posit that assembly + Linux kernel ABI is safer than the traditional C/C++ stack because they are not littered with nearly as much "undefined behavior". Signed arithmetic overflows and underflows as expected. Memory allocation with mmap + MAP_ANONYMOUS initializes it to 0 as expected. Accessing unmapped memory in your address space (including address 0) triggers a SIGSEGV as expected. Your assembler makes much fewer assumptions than your C compiler and doesn't try to be half as clever, so it's more likely to crash and burn on error instead of silently subverting your expectations.