We don’t need:

• general patching (not used in -next)

• bootsplash (outdated, replaced by plymouth)

But might be useful:

• AUFS (I personally use overlayfs but might be useful)

• Kali injection

• Exfat

• Wireguard (for old/vendor/legacy kernels)

Doing what was done to the wifi drivers (each in its own function) will allow -next to include them in its harness.