A bootsplash shows that the boot progress is running. It is easy to identify the running operating system and just adds some nice user experience. There is no technical advantage in having this.
|The ipfire-logos package contains the default theme: http://git.ipfire.org/?p=ipfire-logos.git;a=summary|
systemd and dracut are responsible for the startup of plymouthd. udev manages the initialization of the graphical hardware.