[1] https://cycling74.com/products/max/
[2] https://images-na.ssl-images-amazon.com/images/G/01/software...
It's great at getting out of your way and letting you focus on the results. It's definitely not a typical programming language.
It's great for integrating off the shelf stuff from any major test equipment company. Flow a couple lines and boxes and you've got a PID circuit. Add a few more and you've got a real time oscilloscope. Add a few more and you have data logging. At some point you need to sit down and restructure to get it maintainable, but people who are good with it design it well from the start.
It fits the test bench and small/mid-size experiment system very well.