The logic board has the CPU built in, that's true. However, the Framework 16 has a swappable GPU and all models make the ports independent of the logic board through a USB-C-based expansion module system. So that's even a few parts other manufacturer might consider unreasonable.

(Also, to be fair, I forgot one other thing most laptops let you swap: The WiFi/BT card, if only because it's cheaper to have that on a swappable module.)