Just to paint an example, if I am installing Arch I like to have:

* A user configured through systemd-homed with luks encryption

* The limine bootloader

* snapperd from OpenSUSE with pacman hooks

* systemd-networkd and systemd-resolved

* sway with my custom ruby based bar

* A root filesystem in a btrfs subvolume, often shared across multiple disks in raid0

If you were to follow the installation guide it will tell you to consider these networking/bootloader/encryption options just fine. But trying to create an installer which supports all these bleeding edge features is futile.