R&D aspiration and commercial common sense aren't always as aligned as you would think. Canon and Nikon are still way out ahead as market leaders in the interchangeable lens camera world. And that market share is mainly based on selling DSLR's. So although they're slowly losing market share, they're doing so from a position of having a vastly larger share in the first place. Basically they have to manage the switch in a much more measured way than a business who is trying to gain market share from a position of very little. We tend to have this view of big companies having their head buried in the sand with tech changes but the reality is that they're simply letting others soften the market and iron out the issues because they cannot take on the same level of risk because they have far more to lose. This happens in just about every industry.