If this is well designed, I see this as very useful. If the barrier is lower than callouts to a C library or using cython, and if it's designed in a way to make it easier to write correct critical section code, then this encourages the "right" way to program. (Where right is any area of development where building quickly in a high level language, then optimizing later is one of the better ways to go.)

agreed - I was pulled up on this here last year when we published our benchmarks :) The other thing to remember is the low-level language we use sets a lower bar to entry than say C - the benefit of designing for a specific set of goals (ease of use, performance and security). That said, if you're familiar with C or JavaScript, then KL will be very familiar.

You should do an introductory article for technical audiences yourself perhaps. Or maybe you already have one?

we did a lot of documentation work for launch - the overview is a good place to start: http://documentation.fabric-engine.com/latest/FabricEngine-O...