I guess we humans are just impatient due to our limited lifespan. If you look at the really grand scale of things, even the the speed of light, which for us hum

I guess we humans are just impatient due to our limited lifespan. If you look at the really grand scale of things, even the the speed of light, which for us humans is indistinguishable from instantaneous, becomes incredibly slow. So we now have picked all the 'low hanging fruits' in physics. The really hard stuff may take a few millenniums, which is still unimaginable short compared to the age of the universe. And the universe itself is just out of its infancy and can go on for trillions of years... But we may find another interesting thing or two before we fade away.