It's how I installed Arch btw on my desktop, tiny boot image basically downloads the installer into RAM - NetBoot.

But yeah, if you've got a computer that's old enough to be fully supported yet new enough to have the UEFI for hardware, an ethernet network which is robust enough to download full system images on every restart yet simple enough for the firmware to understand, and tonnes of memory free to hold the whole OS at all times, and you can tolerate the fact that restarts take ages, then it works great.