HN doesn't let me reply to your reply so will reply on your early comment (think too many levels of nesting?). But I agree about your comment on devices, smart

HN doesn't let me reply to your reply so will reply on your early comment (think too many levels of nesting?). But I agree about your comment on devices, smartphone addiction is having negative impact people's mental health - smartphones are a super-useful tool, but too much screen-time has led to detachment from the real world and depression.