Oppo and vivo found an innovative way to avoid having a notch on their flagships. But is that the most amazing piece of innovation lately or are these sliders just an unnecessary complication of the smartphone design? Ivan: "A Slider creates more issues than it solves." Sliders - as in sliding mechanisms to hide the selfie or main camera, as seen in the vivo NEX S and Oppo Find X - are cool. Of course they are. They're innovative and they're out of the box. They've allowed Oppo and vivo to avoid using a notch on their flagship phones and as popular opinion dictates, notches are...
Source: https://www.gsmarena.com/sunday_debate__are_sliders_cool_or_just_a_hassle-news-31940.php