Decoherence theory predicts that any quantum particle coupled to any "large" environment should undergo decoherence and its wavefunction should collapse. This explains why measurement leads to wavepacket reduction.
However, in solids, liquids or gases, electrons within atoms don't reduce and stay as wavefunctions (orbits) somehow protected from the environment of the atoms.
This is surprising since the atoms are at room temperature, with a lot of things to interact with such as neighbouring atoms, light, thermal excitations, etc. So any idea why electrons seem 'protected' from a wavepacket reduction in atoms?