I really thought I'd see meaningful progress on harmonizing quantum mechanics and relativity or some of these other "big" problems in fundamental physics but no

I really thought I'd see meaningful progress on harmonizing quantum mechanics and relativity or some of these other "big" problems in fundamental physics but now I'm not so sure. This by the way is a good reason not to dump tens of billions into a successor to the LHC. We simply don't know what we're looking for. Despite a number of significant upgrades we still haven't found anything that breaks the Standard Model. I mean we've disproven a lot and that means something but we should still have an idea what we're looking for. I'd love to know what making new space (ie what makes the universe expand) actually means. At one point I thought space might be discreet (eg at the Planck length) but that's not how that works. What is time? What is space? What really is mass? What is a force? These are things we can describe the effects of but not really what they are. It would be deeply disappointing if there was a fundamental limit to our understanding that would prohibit a deeper explanation, which actually seems like a possibility.