I used to build all my finalized projects with old fashioned perf board, solder and jumper wires. But solder is kind of a pain - it's much too easy to accidentally bridge the pins and sometimes it grows whiskers - and when you add components or sensors or make wiring mistakes - you end up doing a lot of soldering and desoldering. Bad solder joints can lead to endless frustration when you have noise in the signals. 

Breadboard like this is inexpensive when buy direct from China, plus is so much more flexible and actually is pretty reliable and long lasting once the wires are seated. Changes are super easy - just unplug the wires, no desoldering required. 

And it seems like with the latest in low cost microcontrollers (costing less than $5) - fewer external sensors are needed as more things are on board. For many projects I a just a handful of sensors and things like power transistors or relays and power supply is all that has to be done off board.