One of the problems with solderless breadboards is that they are so fragile, i.e. the circuits built on them are easily disturbed. Further, people using them seldom take the physical parameters of the breadboard, i.e. adjacent contact capacitance, resistance, inductance, etc.

At well-below audio frequencies, which is what the things were designed to support, solderless breadboards should work pretty well. At frequencies well above audio, however, those often ignored parameters become a factor. Further, there's no reason to believe, when you build a circuit, that, if you leave it while you go to lunch, that the circuit will be the same when you return. Things move around, contacts change in their resistance, capacitance, etc ... not much, of course, but they do change, particularly if the circuit is disturbed.

I've had some of these things in my lab for 35 years or so, yet I seldom use one, except, perhaps for demonstrating a very simple low-frequency circuit. There is, in my opinion, no worse way to construct a circuit.

RE