My guess it's because the theory way outpaces the execution. So people always get hyped coz of the theory, but no one can explain the actual new developments because they're actually more engineering related and less about the theory of quantum computing.

My understanding is that the difficulty is keeping qubits in a state of quantum superposition until computation is needed. It's like Schrodinger's Cat: it's both dead and alive (I know I'm butchering the interpretation) until someone measures it... the difficulty is keeping it from getting measured.