My Sony A9 (ver. 1) and Sony 200-600 zoom lens have been working remarkably well for the past year. After months of mistakes, menu learning, and trial and error shooting, I am finally getting consistently sharp and well metered action. However, BFD! This has been true of virtually all major camera systems world wide - whether film or digital - for well over a century. Once you become skilled in using them, getting consistent results of high caliber are going to happen. Virtually all top cameras today will produce superb results, once you've learned their intricacies and mastered your technique. I also Shoot Canon and Nikon, but for BIF, I am loving this Sony rig. One wish I have is I might benefit from a higher res sensor - like 42M +-, since birds are small and the extra resolution brings out higher quality detail. However, my A9 in my current environment is working fine. A used ARIII, IV or AI are options, but not justifiable yet. The A9 at 24MP is still giving me very good quality results if I am within 200 feet away from BIF/horse/wildlife action. Since I live in the country in East Dallas, that's my typically shooting environment. I bought both the Sony A9 and the 200-600 used on EBAY for about 55% below MSRP (2022).That's another plus. RE: this A9III; $6K seems absurdly high,and the camera's features versus my A9, are virtually nill and/or unnecessary for me. But...it must be exciting for the Sony sales dept., along with certain pros / hobbyists that might gain an edge, have a lot of disposable cash, and/or have a company/entity willing to pay the bill for one. My A9 shutter speed is 20fps when in electronic mode. That's plenty fast for the hawks, herons, cardinals, blue jays, geese, and egrets that land on my property every year. And the focus tracking - most critical for BIF/Moving target - is outstanding, now that I finally figured out what the hell I am doing.