I don't see how this is any better than say my ASUS G14 (well, aside that the G14 has 8GB of RAM soldered on). The I/O modules are a novel idea but they still use what looks like a proprietary formfactor and at the end of the day it's USB-C, so I don't see how it's different than buying say a USB-C based dock/hub and calling it a day. The CPU is still soldered on so replacing the CPU or mainboard means replacing both. And since it's still proprietary to them, there's the issue of supply.
Sure it might score a couple of points higher on iFixit's repairability score, but unless every component in a laptop is standardized and adopted as such, we're only catching up to the baseline of laptops from before the mid 2000s.