[Tistron]

I would expect people today to be quite a lot worse at mental arithmetic that we used to be before calculators. And worse at memorizing stuff than before writing.

We have tools to help us with that, and maybe it isn't a big loss? And they also bring new arenas and abilities.

And maybe in the future we will be worse at critical thinking (https://news.ycombinator.com/item?id=43484224), and maybe it isn't a big loss? It is hard to imagine what new abilities and arenas will emerge. Though I think that critical thinking is a worse loss than memory and mental arithmetic. Though, also, we are probably a lot less good at it than we think we are, generally.