It's rather simple, can easily run on bare metal (ie no OS).
You can go very low level, but it has better higher level abstraction capabilities than C.
It's also really weird, which fascinates me. Eg most Forth code doesn't use variable names.
I've toyed around with Forth a bit. But never used it in anger.
Wikipedia says that Forth is used today in some bootloaders and outer space. I suspect the latter is a historic accident, because the inventor of Forth worked on a big telescope.
