If you ask a typical 'entry level' user (those who buy the majority of cameras), may very well think "Kelvin" is a character on the TV show Lost, or an offensive guard for the Pittsburgh Steelers. Of those who know that it's a unit of temperature (albeit one they've never seen on a thermometer), almost none of them will associate it with color temperature for white balance (assuming they even set WB to anything other than Auto, assuming they even get their cameras out of fully automatic mode). Maybe you feel the need for Kelvin WB on an entry-level dSLR…but once again, you are in the minority (an even more miniscule minority than usual, in this case).
The Kelvin scale is part of the science curriculum taught in secondary schools over here in southern Africa.
But given what you've written, why does Canon then include that colour-shift graph thing in ALL THEIR CAMERAS?
As for the SD slot in the 5DIII, most likely the camera had simply entered the design-locked period of development when the Secure Digital UHS-I standard came out. Perhaps it escaped your notice that the SD slots in the 1DsIII and 1D IV are similarly 'throttled'. The 6D is compliant with UHS-I and supports faster SD card writes, as are all cameras of a more recent design age than the 5DIII (e.g. 70D, T5i/650D, EOS M).
I said I just wrote what I've read ... yet you pounce ... on nothing!
For the 'enthusiast with three or so lenses' there are EF-S lenses that deliver excellent IQ (10-22, 17-55/2.8, 15-85), and there are L-series lenses. Canon has provided those folks with plenty of options.
None of those three are primes. All L-primes are "full-frame" and a thus "wasted" on a "crop-frame" camera.
Canon is primarily interested making a profit. A market segment is important to them only insofar as it has the potential to generate that profit. Whether or not you, me, or anyone else is 'genuinely OK with' that is totally irrelevant to Canon.
In order to make a profit, COMPANY must sell stuff to consumers. If the consumers do not like what COMPANY offers, then COMPANY doesn't sell stuff and thus COMPANY doesn't make a profit. Irrelevant indeed.
I kind of think you want canon to go bankrupt with this idea that a few want it so it must be so because the logical points are on the contrary to what your saying. EF lenses are designed for FF, yes, but that doesn't mean that they don't work and that doesn't mean that they don't work quite well. Also, you seem to not understand that the vast majority of cop users don't want a lens that doesn't zoom, nor do they want to pay more than $300 for a lens. It would be mostly wasted money putting out a line of 'L' series EF-S lenses. It makes way more sense to have all the L's EF - L lenses are not eveyone lenses - for one they are specialized and 2 they are pricey - 1 L lens is likely to cost more than the average user is willing to pay for their whole kit. And then add that what if, what if they decide to take it to the next level but they've already spent a ton of $$$ on expnsive EF-s lenses - that's a disgruntled customer who will be more liklely to switch systems because they have to replace EVERYTHING anyways.
and yes, I do have to side with the rest of folks here - the average slr user will never learn anything about photography. I just recently had one of those average users asking me a ton of questions at a gathering. I showed her the modes, explained what the manual controls did, showed her how to manipluate it. I'd watch her walk off and snap some shots...within a minute she's back on auto, pop up flash and all.
the average user just doesn't get it, nor do they really want to - it's that idea of if i pay more then i have to do less - hence why so many people look at a pro's work and say --- wow, you must have a nice camera. LOL, for a while I got really pissed everytime that got said to me, I immediately took it as an insult - that there's no skill involved - just a nice camera and any monkey can push the button. Then I realized that it isn't an insult - they just don't know any better - nor do they really want to. Now I am not saying every entry level slr user falls into these categories, but, that is what drives the market - soccer moms buying an slr at bestbuy...so yeah, advanced features like WB and other things like that would be lost on the vast majority of users ---
while kelvin may be tough in science class, science class doesn't relate it to colors - this is what I leanred of Kelvin in high school - "The kelvin is a unit of measurement for temperature. It is one of the seven base units in the International System of Units (SI) and is assigned the unit symbol K. The kelvin scale is an absolute, thermodynamic temperature scale using as its null point absolute zero, the temperature at which all thermal motion ceases in the classical description of thermodynamics. The kelvin is defined as the fraction 1⁄273.16 of the thermodynamic temperature of the triple point of water (exactly 0.01 °C or 32.018 °F). In other words, it is defined such that the triple point of water is exactly 273.16 K." Basically, science class was not a photography class for us. Hell, I don't even remember it being brought up in the photography classes I did take.