Would you expect anything built on a solderless breadboard to be in any way robust or rugged? It is a temporary construction method suitable for quick experimentation - like rats nest.
Robust and rugged enough to place probes and modify it without chance of starting a new problem, yes. It IS a rat's nest. But you can do rat's nest (random trace, without close coupling of wires) without adding so much to the 3rd dimension.
If you need, you can add twisted pair even, where needed. Plug and play jumpers are only quick and easy to a certain point. He passed that point several rats ago.
![Smiley :)](https://www.eevblog.com/forum/Smileys/default/smiley.gif)
Quick experimentation should preferably allow some modification without playing Operation or untangling Gordian knot. It IS possible on a solderless breadboard. This is why for higher complexity of connections, I use wire wrap on the breadboard. How he even managed to place the last 50 jumper wires...
![Laughing :-DD](https://www.eevblog.com/forum/Smileys/default/smiley_laughing.gif)
I honestly thought the picture was a gag.