I purchased my first Z7 late 2018, and another a few months later. Both were intended for my photomacrographic and studio/focus stacking work, and apart from a "burn-in" week to familiarise myself with the camera where it was used outdoors, both units have never left my studio since. I run them on A/C and they just perform day in and day out, no issues at all. I see no need to update either unless it breaks down, and in that case, probably would replace it with a similar model.