“Linux kernel graphics drivers have been growing too much in size that they are taking too long to load at boot time for quickly lighting up the display to present the nice Plymouth boot splash experience. This has led to situations of the Plymouth boot splash screen falling back to its simple text-based interface after timing out. As a workaround, Fedora 42 is looking to use the generic “SimpleDRM” driver during this initial boot splash screen experience to initially avoid the bulky DRM drivers”
It probably loads updates right on launch, and they have higher privileges than the actual GUI.
I find it pretty unusable too, and it should be fixed. It does not happen that extremely on my (recent) laptop, but it is still very slow, as the updates are a real performance hog