[bff]

The software process that develops the applications are very different. An avionics system must be able to operate autonomously, must have robust fault detection and tolerance, and must interact directly with many hardware components.

Web apps tend to layer on top of other systems and can reuse a lot of code. When I worked on avionics software we had to develop everything, from the hardware drivers for memory modules to the drivers for the display and all of the controlling systems for each of them. A high-performance web app just needs to perform well enough - at some point you can add more hardware. In an avionics platform you have specific weight, cooling, and power requirements that limit your total hardware capability. They are really very different.