Those needing high DR and high resolution may be a small minority. That may explain why Canon is a bit lenient on sensor development.
Some of us have been correctly making that
exact point for some years now, Erik.
Simple proof? Just look at which camera company sells the most cameras... If Canon wasn't making (more or less) the right cameras for the vast majority of its customers, it simply wouldn't be the market leader, and either Nikon or Sony would be.
How
are they doing, financially?
Oh, yeah...Clearly, the potential market share to be gained from courting the small-but-vociferous high DR/high res crowd isn't really worth the trouble to Canon. So if it happens (and FWIW, I imagine it will) it will be on Canon's terms, and not because of the noise and heat coming from some numerically insignificant sector of the market.
(But as an aside, can I point out that it wasn't
that long ago - in "generational" terms - that the highest resolution DSLR available was the Canon 1Ds Mk III? Everything that came afterwards was
in response to Canon).