[acdha]

Those are good selling points but all but the last applies equally to a tablet (e.g. there’s no law requiring you to use a tablet on battery).

The key point is the single function: a general purpose computing device has more UI & management than some people want to deal with. This is something the industry really hasn’t done a great job with, especially since it overlaps with the problem of treating things as disposable because the revenue model for single purpose devices is mostly broken and so people are often forced to churn them because the device they’re used to has been discontinued or no longer works with their WiFi.