Imagine the mountain of electronic waste if everyone needs a separate gadget for every task.
A screen is a screen. In theory, a single general-purpose computer with a screen is the simplest solution of all.
The real problem, as I see it, is that it has become very hard to make a general purpose computer with good UX and decent privacy. All the forces are working against it. But we should not give up trying.
Pretty much for that reason the only piece of tech in the last 15 years that I've genuinely liked is the Kindle (or comparable ereaders).
Literally just displays books in a format that feels pretty natural and does almost nothing else.