[scottmagdalein]

When do you think this space will reach full saturation to the put that new entrants will find it hard to notch out a spot in it?

[mattangriffel]

As some others have mentioned, knowledge economies are not zero-sum. It's not like you can only use one course or one class (I've taken many).

As for market saturation, I think it depends on what your thoughts are about theories that some futurists (like Doug Rushkoff) have put forward saying that one day everyone will have to learn how to code. If everyone will one day learn how to code, then it's a pretty big market.