Or look at it another way, who is going pay for one of these and, then just bung in an of-the-shelf AIO cooler?
Actually, *PLENTY* of people have used AIOs and even air coolers inside a $1000 to $10K computer case.
It does not just have to be an AIO cooler that makes the absolute WORST layout terrible for water cooling! Go to their product page at:
https://www.in-win.com/en/gaming-chassis/infinite
Go ahead and tell me how a custom loop can be arranged inside that metal frame for optimum pump location relative to that single vertical 360 radiator. For extra credit, tell me how you would mod that case to add a 2nd 360/420 or 240/280 radiator for better cooling. Also notice that not a single one of InWin's marketing photos shows the fact that in actual use, you would have an ugly fountain of 4 to 12 USB, audio, and video cables coming out of the upward-facing rear I/O and GPU ports that are all 30 to 36 inches above the table, thus possibly needing extra-long video cables and USB extension cables. And then plugging cables into the front I/O ports that are also halfway up the case also results in more cable mess. It would have been very easy to design the layout with the rear I/O and GPU ports facing sideways at the rear or facing downward, but InWin has always been about exterior design and totally clueless with interior design and cable management.
Yes, it is possible to completely disassemble this case, make your own water-cooling brackets to position a pump down below that 360 radiator, and find a way to bung in a second radiator mount somewhere at the bottom of the black internal frame for a second bottom-mounted radiator. But a $7100 computer case is like a $1-million or $2-million Lamborghini. If you buy a $2-million Lamborghini Centenario, but then you realize that all its pipes and tubing are sticking up out of the engine and it lacks extra air intakes for better performance, you should not have to spend $2-million on the Lambo only to feel the necessity to disassemble the car, reposition the entire rear engine to hide an ugly clutter of tubing and wiring, and cut more air intakes into the metal and add more metal brackets to improve the Lambo's performance and usability.
My original comment still firmly stands: a $7100 47-kg computer case should already have ready-to-use options for a custom loop using 2 - not just 1 - 360 or 480 radiators. And the mobo tray should not be hoisted high up above the radiator position because even making a 1-rad custom loop would require modding to nestle the pump/reservoir down low into the bowels of that black internal frame to prevent pump burn-out and poor water cooling performance.
TLDR: Someone who spends $7100 on a computer case may or may not use an AIO, but they also should not be required to cut and bend metal to mod the case for better cooling and functionality. Like a $2-million Lambo, InWin's terribly misguided Infinite should be ready-to-use as-is. You can buy a case for less than $100 that offers dual radiator support, optimum placements of both radiators, and space for custom loops.