In the foundations of physics we haven't seen progress for the past four decades
Just a thought: The fact that there is physics beyond current knowledge doesn't necessarily mean that it's achievable to find out about it.Think about it: Finding confirmation for the Higgs Boson required building a particle accelerator of 27 kilometers. For the larger part of humanities existence it was probably unthinkable to design such an experiment.What if the next level of yet unknown physics requires building a machine that's as large as the equator? Or larger than anything that can be built on earth?