I think a lot of the resistance comes from the fact that this change will make initramfs needed for more setups and there's a lot of hate for initramfs in the Gentoo community. I was in the same camp for a long time too before I started using whole disk encryption and thus needed to have one.
A lot of this resistance could be overcome tools like Dracut had better documentation, not just command line options but a step-by-step explanation of how it constructs the initramfs and what happens between when the kernel starts executing it and it hands over control to /sbin/init. Right now it's just a black box that works most of the time but when it fails those failures tend to be inexplicable.
I'm guessing the documentation that does exist was written based on a binary distribution paradigm where most users boot a pre-compiled kernel so the users for the most part don't need to know how dracut works internally to make sure their system will boot.