Planes actually have major portions of the software written in non-C languages such as ADA - see https://www.manufacturing.net/aerospace/news/21175187/airbus-ch

Planes actually have major portions of the software written in non-C languages such as ADA - see https://www.manufacturing.net/aerospace/news/21175187/airbus-chooses-gnat-pro-ada-for-development-of-unmanned-aerial-system https://www.manufacturing.net/aerospace/news/21175187/airbus... And are very proud of it. Medical equipment is not all implemented in embedded C systems. And since modern embedded systems can easily run python or embedded JS versions, well, perhaps certain critical libs can actually get implemented in something that does not deal with memory... and the 5-10% penalty in performance is not going to be something anyone really notes.