It was not my intention being sarcastic. I don't find it funny in any possible way.
I'm sorry that I cannot provide you with specifics. The problem I have witnessed is this:
I work for an engineering company, developing custom automation products. It's very rare to find Linux based developments running there, all important automation packages run on Windows.
One of our clients, though, bought a system for classifying defects based on video cameras. The system was running in an very old Ubuntu (Dapper I believe) PC. When the time came to replace that computer they first tried with a recent Ubuntu. The application refused to run. They called to me and I had to explain what Unity is, and that they need to install Gnome, which they did. The application crashed. The only way they found to make it work was to install an old version of Ubuntu (10.4). I don't know what the concrete problem was, just that they could not fix it. After that, they have been regretting their decision of buying anything based on Linux.
What do you think they will do if I suggest to them to buy something based on Linux?