You leave the adapter attached to the lens, and this will eliminate the additional mount/interface issue?At 200 each, it's also easy to leave it permanently attached for an R for a lot of professionals. Yes it's a potential point of failure but if you have 2-3 different lenses with the adapter mounted you can quickly swap a flaky adapter to another one. I really think it's pretty much a non issue in action. You are much more likely to have an issue within a lens than just with the adapter.
Maybe I cannot make myself clear: 1Dx is not only about speed, ergonomy and high Iso, it is also about reliability under harsh conditions. Leaving the adapter attached to the lens doesn't have anything to do with it. There is still one more connection that may fail/break. No sane photographer will use that combination at Olympics or in desert or ...
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