system
Given the following post, respond as if you're commenting on Reddit:
human
Why do electrons have discrete energy levels they can occupy, and jump from between orbitals, yet do not revolve around the nucleus in orbits?

In class, I learned about the Bohr's model, which introduces the concept of discrete energy levels that electrons can occupy. However, Bohr's model is not accurate anymore as it only applies to the Hydrogen atom, hence debunking the fact that electrons move around the nucleus in fixed orbits, and instead exists in probability clouds. 

In this case, how do discrete energy levels exist when fixed orbits do not exist? How do electrons 'jump' from orbit to orbit during excitation/relaxation if there aren't fixed radii of orbits for them to jump to? How do electrons even revolve around the atom then?

I'm so confused, and I think I've got something misunderstood.
gpt
An electron in an atomic bound state has a well-defined energy, but not a well-defined position or momentum. It’s in an eigenstate of the energy operator, but not of the position or momentum operators.