Mirrorless is the future but, for me, not the present. I've just moved from Micro 4/3 back to DSLR.
The technical arguments regarding mirrorless kit are irrelevant (AF issues are disappearing and pixel peeping is a colossal waste of time) but there remain personal and practical issues, for me least.
As someone in another thread observed, the photographer's relationship with their camera is 'visceral'. There's a deep subjective connection that makes a camera feel 'right' when picked up. I thought I had it with the Panasonic G3 but now, three years on, suspect I was carried away with the obvious advantages of the mirrorless concept without considering the human aspect of camera use.
More buttons on smaller bodies doesn't help if those bodies follow the traditional shape never intended to house additional controls. On the G3, X-Pro 1 and a couple of other bodies I borrowed and tried, the fleshy part of my hand constantly hit the controls on the right rear of the camera. This brought up menus, sometimes changed settings unintentionally and required precious seconds to rectify leading to too many lost opportunities. My wife and I both suffered with this as did several friends, one of whom changed his mind about switching from DSLRs.
The underlying principle of ergonomics is that the object conforms to the needs of the human being, not the other way around. Until someone 'does an Apple' with mirrorless camera design, more controls on a smaller body will always be a downside.
Prices are another problem. Both lenses and high end bodies that compete with DSLRs are simply too expensive for my pocket. I, like many others, want something that offers creative possibilities without breaking the bank. Financially, family, food and home come first which leaves a finite, usually small, amount left for pastimes even a primary hobby like photography. Money proved the tipping point for me as, when shopping around for a new Micro 4/3 lens, I realised its cost was fractionally less than a new, entry level DSLR. Adding in the unhappiness with the ergonomics of a smaller camera and the change back to a DSLR was inevitable.
Additionally there are different, incompatible systems from a variety of manufacturers. When investing money time and energy into a camera system I want to know that it's going to allow at least the possibility of catering for my future needs and stay around long enough for me to see a return on my investment. I can't see how, in a finite market, all the various systems will survive.
Personally I'll wait until the dust settles in the marketplace before considering another switch away from DSLRs. For now I'll stick with my modest D3300, kit lens & SB400 and maybe a larger reach zoom until Nikon brings out a mirrorless, full frame camera with backwards lens compatibility, Canon 1DX ISO performance, 100% EVF / viewfinder, 4K video and ergonomics for human hands all at the current D3300 price point. I reckon I'll only have to wait about 5 years.
