I love iGPUs too, but they are great until they're not...
In my recent experience on an Intel z790/i7-14700K system, getting a signal during boot (e.g., when you want to go into BIOS) was not reliable (usually worked, but sometimes not). When connected to a portable 1280x720 monitor I use when setting up systems, parts of the BIOS screens were a garbled mess. Plugging in a discrete GPU fixed that.
I've also encountered weirdness on the same system where I couldn't disable secure boot until I booted from a discrete GPU (and then after that, on iGPU, I could enable/disable at will). Plus CSM is not an option when booting from certain Intel iGPUs: https://www.asus.com/me-en/support/FAQ/1045467/
In my recent experience on an Intel z790/i7-14700K system, getting a signal during boot (e.g., when you want to go into BIOS) was not reliable (usually worked, but sometimes not). When connected to a portable 1280x720 monitor I use when setting up systems, parts of the BIOS screens were a garbled mess. Plugging in a discrete GPU fixed that.
I've also encountered weirdness on the same system where I couldn't disable secure boot until I booted from a discrete GPU (and then after that, on iGPU, I could enable/disable at will). Plus CSM is not an option when booting from certain Intel iGPUs: https://www.asus.com/me-en/support/FAQ/1045467/
Or even better, with AMD APUs 4 years ago, if you used a discrete Radeon GPU instead, you'd lose sound over HDMI: https://www.reddit.com/r/Amd/comments/d5emmk/agesa_bug_no_so...