I keep hearing this as some sort of "common knowledge" but no one can really lay out why. I've shipped stuff with ROS (albeit with some custom modules that needed customization).
But genuine question, has some who has actually shipped with ROS laid out what they would like it to do better?
Like anything, I think ROS can be used well. The people who use it well would probably do better with other tools, though. The people who prefer ROS seem to be young engineers, likely recent grads (ROS is endemic in grad school) who enjoy fast prototyping, which of course is very cool and fun, but also anathema to getting real work done past a certain point. If for no other reason than it is a configuration and debugging nightmare.
This is just my observation and should be taken lightly.
But genuine question, has some who has actually shipped with ROS laid out what they would like it to do better?