How important is it to have something like coreboot for your firmware/BIOS on your router? I run pfsense on a mini PC router from aliexpress that has an Intel n100 cpu in it, so I guess the bios is intel as well. I self host a few things on an unraid machine, some apps are exposed to the internet through cloudflare tunnels.
Not very. If it boots it boots. Although the ACPI implementation may be a little less buggy (plus you can fix it yourself if needed), so if you’re having power management issues it may help.