Their "rivalry" reminds me of the Canon/Nikkon co-existence model. Where they competed but in slightly different market segments. One would have lenses for x-ty

Their "rivalry" reminds me of the Canon/Nikkon co-existence model. Where they competed but in slightly different market segments. One would have lenses for x-type of photography, while the other had them for y-type photography. Or one would have great sensor in some dimension (color vs bleed) or flash system, etc. And they both co-exist without annihilating the other one -although Nikkon seems to have made some poor decisions of late (and nixed one of their most anticipated products due to costs and ongoing product issues)