The GPU is the most expensive component in gaming PCs these days, thus it makes the least sense for it to be the hard-wired component as there is the most price

The GPU is the most expensive component in gaming PCs these days, thus it makes the least sense for it to be the hard-wired component as there is the most price diversity in options. I have definitely upgraded GPUs on several computers over the past decade and I'm very thankful I didn't have to rip out the entire motherboard (and detach/reattach everything) to do so. It's only the cheap components without a wide variety of options that make sense to build in, like WiFi, USB, and Ethernet.