what would you buy today.
A9III A1 A7R5 .......
I really think may people will take the A1 over the A9iii because of IQ and resolution.
i know no Distortion and flash sync are beneficial but will you compromise for better IQ and resolution.
I guess everyone have their own dream specs. maybe if it was a 33mp with say half a stop worse noise levels would have been more tempting
My answer is probably the one you don't want to hear - there is no one perfect camera. Each camera has strengths and weaknesses. And sometimes the answer is not one camera, but two, or more.
I own all three, but I bought each as they came out, so the cost was spread out. I could easily imagine buying the A7RV and A9 III together (especially if money was not an issue!) because they are complementary. The A1 has some of the advantages of both (although not as much as when I was comparing the A1 with the A7R4 and the A9 II that I owned at the time!).
Fact is, no camera can really "do it all" (no matter what the Marketing Department wants you to believe). I prefer to choose which camera I want to use today, rather than which camera I want to use for the next 3 years. Sometime the choice is two cameras :-D
All three can produce high quality images. All the guff about the A9 III "sacrificing image quality" - it's nonsense. Yes, you are limited to a base ISO of 250, but when did you last worry about using ISO 250? Put all three cameras on ISO 250, and they show pretty much the same image quality - there's more difference due to the pixel count. Yes, I'm warier of low light using the A9 III, but it's nowhere near as bad as the naysayers make it out to be.
You don't have to be shooting sport to enjoy the advantages of the A9 III's frame rate - I was shooting a dancer in dappled sunlight, and shot a jump at 60 fps - caught the peak of the jump easily, which was far easier than trying to time my shot and asking her to repeat the jump many times.
I believe the reason the A9 III is 24Mpixel (rather than the 33 you mention) is for several reasons - they hinted in the announcement that it was the highest pixel count they could make at the time. But this camera tempts you into shooting a LOT of frames, and I am grateful that they are smaller than the frames from the A1 and A7RV :-D You get about 4800 lossless compressed frames on a 160GB CFeA card, and I've done that multiple times.
You may well see a 33Mpixel global shutter sensor some time, but I'll be very surprised if it's this year. I'll be somewhat surprised if it's next year, too. Remember how long it took to go from the original A9 to the A9 II to the A1?