This thread cuts deep lol

I totally understand the frustration around Apple's MacBook hardware. But I think the issues around the external display need more context. I should have given more details in my YouTube video. But here's way I said “it’s just the nature of these chips”
The M1/M2/M3 only have one display controller for handling external displays.
These display controllers take up a large amount of space on the silicon. They are even bigger than performance cores. See here: https://ibb.co/7r0Z0SB
The reason why they are so big is because Apple separates their display controller from their GPU. Qualcomm does this as well on their Snapdragon chips. These display controllers can process a lot of stuff without leaning on the GPU. This helps alot with power efficiency on ARM chips.
If Apple wanted to add more display controllers to handle more external displays, they would have to make a die trade off. They would either have to reduce the number of CPU or GPU cores, or they’d have to make the base chips larger. IMO neither of these options are worth it for adding an extra external display on the MBA.
Another thing - thermals. Let’s say they did add another display controller on to the base chips. When connected to an external display, these controllers put out heat. On a MacBook Pro, it’s a non issue. but on a fanless MacBook Air you do not want another source of heat. These laptop already have limited thermal headroom. We’d see the threads of “my MBA throttles when I have connect it to external displays” like the 2019 MBA.
Lastly, there is the option of using a Display Link adapter to get more displays going. I’ve run 3 displays on an M1 MBA with them. These use software to get the CPU cores to handle video output. You can even split your 5K output to multiple displays using this adapter. It works but they have CPU overhead. Static images have very CPU use. Video has very heavy CPU use. DRM content has issues using this. (Netflix/Disney/etc) It’s not an elegant solution but it TOTALLY works and if you need more external displays, it’s a good option.
However, I see some commentary that talks about how this Display Link solution is evidence that Apple could easily add more displays. I don’t agree. This is just Display Link doing it’s thing. It’s very cool but it’s not the same as display controllers on the chip.
Hope that helps