[CentOS] CentOS 8 creates /boot with ext4

I just installed CentOS 8 in a VirtualBox VM, to explore it. Immediately, I noticed something strange. I insatlled it using a kickstart file, whose partitioning section is this:

zerombr clearpart --all --initlabel reqpart --add-boot part pv.01 --ondisk=/dev/sda --size=1 --grow volgroup vg01 pv.01 logvol / --name=lv_root --vgname=vg01 --size=1 --grow bootloader --driveorder=sda

On CentOS 7, this resulted in an XFS-formatted /boot filesystem. In CentOS 8, this created an EXT4-formatted /boot filesystem.

I looked through RHEL 8's release notes and other documentation, but could not find any place that mentions this change. Does anyone know if this is deliberate, or a bug of some kind?

Regards, Anand