Ironically, it's not particularly accessible or simple. It's certainly more complicated than 80s-style BASIC.

And the number of VBA users compared to the number of Office users is not huge.

Even so - VBA proves that if you make a development tool accessible enough and obviously useful enough at least some non-programmers will start writing code for it.

The challenge for something like Eve is usefulness. What's the user benefit? To date I'm not seeing one - which doesn't mean there isn't one, just that so far it's not obvious to me.

I can certainly understand a vision that makes technology of all kinds far more accessible and responsive. But asking users to make their own code probably isn't the answer there - I think it's more likely to be some kind of contextual inference/AI/NLP system that's smart enough to make good guesses about what users want and handles the low level stuff for them.