I have never used my mobile camera simply because I hate to compose a picture on an lcd screen. For more than 55 years, I have been used to SLR cameras and the idea of seeing a subject and composing is real unlike composing it on a lcd screen or monitor. Checking depth of field, sharpness, composition, angle of view, perspective observing critical expression is all real when you view through the actual view finder rather than with live view!. Besides, I guess that the mirrorless cameras are going to consume more battery and the sensor life is going to be short just as we change our mobiles very frequently these days. Even the Apple's touch screen has failed many times and the live view has disappeared! Humidity and dust causes lots of problem!? I feel that the SLR should remain as such and mirror less for those who prefer to carry less weight. I think, I will give up photography once and for all, if DSLR disappears!