Imagine a world where people knew everything we know today except for high energy physics, where their knowledge ends at our ~1950s level. Is there any real world application, any particular piece of technology, that we currently have or that is under development, they would not have because of their lack of knowledge?
To be more precise: In this fictional world, people for example know QED, renormalization and Feynman rules, but they do not know QCD, the particle zoo, the Standard Model and beyond. However, they have developed things like topological methods in condensed matter, as well as the world wide web independently, without doing research in particle physics. Also, I would not count applications such as positron emission tomography, because the ideas from particle physics it relies on predate 1950s.