It doesn't have to be done. I've worked on POS and smart-weighing systems that were cross-platform (Windows and Linux). Neither used AV, but they were tightly

It doesn't have to be done. I've worked on POS and smart-weighing systems that were cross-platform (Windows and Linux). Neither used AV, but they were tightly locked down. My impression was that most customers don't care about the OS. Some prefer Windows, they already have the tech personnel in place. On the other hand, the Linux ports were done because a very big customer said that they had to have Linux... It certainly cost them more than licensing Windows. :) From a dev point of view, Windows was easier, as it is generally more friendly towards C++ development. The OSes were about equally capable, I didn't see any Linux technical advantages in practice.