Not really. There is a compromise between output resolution, refresh rate, bit depth (think HDR), number of displays, and the overall system performance. Another computer might technically have more monitor output, but they probably sacrificed something to get there like resolution, HDR, power consumption or cost. Apple is doing 5K output with HDR on their lowest end chips. Think about that for a minute.
A lot of people like to blame AMD for high ideal power usage when they are running multi-monitor setups with different refresh rates and resolutions. Likewise I have seen Intel systems struggle to run a single 4K monitor because they were in single channel mode. Apple probably wanted to avoid those issues on their lower end chips which have much less bandwidth to play with.