Nice review, but when you start your article with a historical statement, please check its accuracy first:
"In the four-odd years between the launch of the Olympus E-1 - the camera that heralded the first all-new SLR system for almost quarter of a century"
Well, I can think of two newer than 20 years SLR systems easily. The first would be the Minolta V system for APS (IX240) film. The second would be the Contax N system. Both even had a DSLR model before they died: the Minolta RD-3000 for the V system and the Contax N Digital for the N system. Simon Joinson has an impressive CV, but apparently history is not his strongpoint or his definition of "all-new SLR system" is unusually strict. Even in the letter case, I cannot think of any reason why the Minolta V and Contax N would not be counted as all-new SLR systems.
"In the four-odd years between the launch of the Olympus E-1 - the camera that heralded the first all-new SLR system for almost quarter of a century"
Well, I can think of two newer than 20 years SLR systems easily. The first would be the Minolta V system for APS (IX240) film. The second would be the Contax N system. Both even had a DSLR model before they died: the Minolta RD-3000 for the V system and the Contax N Digital for the N system. Simon Joinson has an impressive CV, but apparently history is not his strongpoint or his definition of "all-new SLR system" is unusually strict. Even in the letter case, I cannot think of any reason why the Minolta V and Contax N would not be counted as all-new SLR systems.