Curious to know the coolest things you achieved by configuring your kernel. I know kernel config can be boring, but I’m hoping someone will have an impressive answer.
For me I have a very lightweight kernel that runs wayland on nvidia without any issues to date.
I suppose the most tangible benefit I get out of it is embedding a custom initramfs into the kernel and using it as an EFI stub. Also I usually disable module loading and compile in everything I need, which feels cleaner. And I make sure to tune the settings for my CPU and GPU (and enable VFIO, etc.)