They chiplet past 500
I don't know if I'm using the right vocabulary, maybe "die size" is the wrong way to describe it. But the Ultra line packages two Max SoCs with a high performance interconnect, so that the whole package does use about 1000 mm^2 of silicon.
My broader point is that much of Apple's performance comes from their willingness to actually use a lot of silicon area to achieve that performance, and it's very expensive to do so.
Ok so most monitors sold today support DDC/CI controls for at least brightness, and some support controlling color profiles over the DDC/CI interface.
If you get some kind of external ambient light sensor and plug it into a USB port, you might be able to configure a script that controls the brightness of the monitor based on ambient light, without buying a new monitor.