Nodal analysis - Super node needed?
one usually chooses a node as reference node such that one can reach as many other nodes as possible.


I've never heard of this as a criterion for choosing the reference node. Usually one of the nodes connected to the power supply is the reference node. This might chance to also be connected to a large number of circuit branches.

In any case, it does not matter which node is chosen as the reference node. It won't affect the solution at all (except to offset the numerical values of the node voltages to all be relative to the chosen reference).

A super node is needed when there is an independent voltage source in the circuit.