Is nature infinitely complex?

The universe is likely infinite in size. Yet is it infinite in its constituent units of structure? Right now we don’t understand what the universe is made of (dark energy and dark matter), we don’t know how to unite gravity with quantum mechanics, we dont know if there are undiscovered particles to be found or if quarks are made of something fundamentally smaller, and we don’t know if higher dimensions exist. Yet those things will not always be so. They will be solved probably in the next 50 years. Then you have things closer to the human day to day. Why are people athletic or LGBT or good singers? What is the nature of consciousness? What is time? These are likely even harder to figure out but it may be solved within the next 100-150 years (if our species survives).

Yet that prompts the question. Will there be a point where we know how EVERYTHING works or will nature always present new challenges to solve?

This is more of a philosophical question but it’s the only one that really matters. Quantum gravity doesn’t keep me up at night. This does.