Finding the differences in a series of power supplies

There was a revolution in phone/laptop power supplies when they switched to GaN.

Is anybody doing GaN power supplies for desktops? The premium market might be interesting.

Nice. It would have been interesting to dive into the exact differences in components. Are higher wattage PSUs in a series just using higher rated components or does the quality go up too?

I was thinking about oldschool PC PSUs the other day. Specifically, my current portable https://github.com/vk2diy/hackbook-m4-mini is smaller than the PSU on my last Gentoo PC, and no doubt more efficient. Hate giving Apple money but I guess that's 40+ years of accrued engineering plus sacrificing serviceability for form factor and passive thermals.