Brad Hill’s user reports do capture my attention. For reasons similar to his, but before seeing this March 2018 report, I bought a D5, in February 2018, after already having added a D500 in November 2017. Not that we have many bears, here, but plenty of alligators, in this wet, green, heavily-vegetated edge of Texas.
Largely due to Brad Hill’s earlier reports, I am considering a Sigma 500/4 Sport lens.
The D500’s superior AF had already relegated my D3s to secondary status, before I added the D5. I do plan to keep the D3s.
My Df, of course, remains relevant.