There are people who are not interested in using ROS for their robots. Here is one story that I found on Internet! http://pulurobotics.fi/blog/pulurobotics-blog-1/post/why-don-t-we-use-ros-7 --- [Visit Topic](https://discourse.ros.org/t/why-dont-we-use-ros/3161/1) or reply to this email to respond.