Sony Alpha a7R Mark IV A Mirrorless Digital Camera Body Only - Brand New review
If you're looking for a full-frame camera that delivers images which compete against medium format cameras, while also offering the advantages of the most diverse lineup of full-frame lenses on the market and incredibly reliable autofocus, then the A7R IV is the camera to get.
Highest resolution of any full-frame sensor, Impressive overall image quality, Best autofocus in its class, Best feature set in its class, Compact & lightweight VS medium format, Lens selection VS medium format, Best ergonomics in its class/lineage
A7R III is already a very good, class-leading choice, May be less of a value compared to more affordable Sony's, Menus still complex & time-consuming, Buffer clearing still shuts down much of the camera, Ergonomics still have a few quirks