You are not comparing like with like.
On the one hand you have adults with special interests and needs. On the other you have children with a lot to take in, much of which will be of no interest, with less maturity and possibly less mental development.
When I want to do research I much prefer to have a hard copy of the reference. I find it easier to use and with the added advantage that it will never run out of power and is usually a lot more robust in the area in which I use it.
I maybe not typical but this research is on to something.