I'm impressed with the reviews of the Sony RX10 4. It does seem the ideal camera for general purposes, and I'm considering a purchase.
What holds me back is the lack of comparisons between, say, a Nikon D7200 with 80-400/ F5.6 lens at 400 mm (equivalent to 600 mm full frame), and the Sony RX10 at 600 mm equivalence.
If the difference is very small, or insignificant, then I'd buy the Sony RX10. But I simply don't know, despite all my internet searches. Why is nobody publishing such comparisons?