Let's look at the case of neutron decay as an example. We start out with a free neutron before the decay happens. It's just three quarks bound in a particle. It then decays into a proton, electron and an anti-neutrino. Can we observe, even in principle, some disturbance in the quark/charge distribution shortly before the decay happens? How long does it take for the process to happen from start to finish? What happens in-between? Is there even an in-between state, or is it just a quantum superposition of the two until a measurement is made, at which point we either see the original neutron or the thee particles it decayed into?