"Trusted data" can exist in theory -- on a closed network where you control all endpoints -- but does not exist in practice (as many devices eventually connect

"Trusted data" can exist in theory -- on a closed network where you control all endpoints -- but does not exist in practice (as many devices eventually connect to the Internet or exchange data with Internet-connected computers). Therefore, it follows that re-writing parsers in memory-safe languages would provide a nice bang-for-buck.