Four years on: following the pathway to real world impact of engineering research

Here we present five short case studies in which key authors of papers originally published in Communications Engineering in 2022 describe the impact of their work four years on. These reflections provide a glimpse of what the papers meant for the key researchers involved, their research groups, goals, and broader communities. The pieces also give an insight into what the actual pathway to real world implementation of applied science and engineering research looks like.