It's the wrong question unless you are in the business of profiting off of container tech directly. What are you doing for the stakeholders delegating your pay checks and the person authorized to fire you? If they are happy, then it doesn't matter what the company uses. Most transactions and the world's wealth are stored and processed on operating systems and frameworks most people have never heard of which will outlast either of these by decades but that doesn't mean you should or shouldn't use them necessarily..