I would be very interested to hear from someone using Forth in production (especially for something like the above link) on their personal experience wrt its advantages compared to other available options.

one of my very first jobs we had products for monitoring underground petrol tanks and petrol (gas, even though it's not a gas ;-) ) pumps. All written in forth, while a bit obscure, actually was quite cool.

as an aside, The guy who was primarily responsible for that now has a FRP library ( http://sodium.nz/ ) and written a book on FRP using petrol pumps as an example

It was also used for some of the drivers of a probe in the Rosetta mission (I think, at the very least it was a probe made by the ESA)