> except in hucksters' advertising brochures, i don't agree with your implicit assertion that all the polysemic complexity of 'simple' is merely historical, leaving only 'easy' as a live meaning; i think all the meanings i listed above except for 'harmless' have some currency today, even merely in english

Look at this comment thread and count all the instances where people are complaining that 'simple' is being used to describe difficult things:

https://news.ycombinator.com/item?id=35759449

I'm not the only one who thinks that 'simple' should mean, in technical docs, 'easy'.