This is comical and sad at the same time. The 6D II will be forever plagued by this regurgitated internet garbage just as the original 6D has been hammered for it's 'poor AF system'. I can attest to the fact that there is absolutely nothing wrong with the AF system on the 6D......at least not on mine. So I can only imagine this dynamic range scarlet letter that has been hung on the 6D II falls into the same pant load of crap as the poor AF. As a result, many will avoid buying a great, affordable, more than capable camera for no sound reason.
Great images? Really? From a 6D II? How can that possibly be......what with it's terrible DR?
You're very good at mocking the strawman. No one has ever implied that low base-ISO DR affects all images noticeably. It does, however, prevent adopting more advantageous approaches to exposure that
give more highlight headroom, like negative film, and smaller RAW files at the same time.
High base-ISO DR is not some gratuitous special effect. It just means less camera-added noise, usually potentially visible at base and very low ISOs. HTP, 1/3-stop digitally pushed ISOs (125, 250 etc on most Canons), and f-numbers below 2.8 all cause "under-exposure" and are least risky with low added post-gain read noise (or high DR) at low ISOs to work without problems. They have only come with warning tags in the past because of high post-gain noise (low base-ISO DR).