Hi Mike!
I’m neither ROS nor OpenEmbedded expert, but I’ve spent some time working with both projects and my gut feeling is that there’s maybe just a couple of companies using ROS on top of OpenEmbedded in production internally at the moment. I’m pretty sure nobody builds real commercial products or something that goes beyond a research projects. And I know what it takes to build a product (In my previous life I worked on the integration system used to build Nokia N9).
I guess the best way to find out what people are concerned about is to have a look at the programs of ROS (and ROS Industrial) conferences. You’ll see that the majority of ROS users are researchers happy with Ubuntu as a baseline for ROS.
BR,
Dmitry