The GA144 is so different from the classic way of computing that it requires new approaches of development. One very interesting feature of GA144 is that all 144 cores can share instructions over I/O lines. That means every core can send instructions to their neighbors who execute them directly without conversion.
I/O ist fast enough. I guess it should be possible to have (someday) an external interface to SRAM which circumvents the low memory problem.
> They offer no compiler from high-level language like C.
That's right, and that's the real weak spot of GA144. Almost every microcontroller board today comes with C or alike. Mr. Moore loves Forth but I doubt that there are many developers out there who like to be forced to learn Forth just for this single platform. I know Forth, it was one of my first languages I ever learned. It is perfectly suitable for embedded systems but you have to learn a lot to master it.