One of the main difficulties in unifying quantum mechanics and general relativity is the fact that they are based on different mathematical frameworks. Quantum mechanics is based on the Schrödinger equation, which describes the wave-like behavior of matter and energy, while general relativity is based on the theory of gravity proposed by Albert Einstein, which describes the behavior of massive objects in terms of their gravitational fields.
The unification of quantum mechanics and general relativity is important because it would provide a deeper understanding of the fundamental laws that govern the universe. It could also lead to the development of new technologies, such as quantum computers and gravitational wave detectors, which could revolutionize our understanding of the universe.