Think about booting over network. Or having /usr on another drive. Including even network drive. Think about dumb terminals(wrong cetury) thin clients. For example they can use small disk to quickly boot wihout downloading kernel and initramfs and use NFS for /usr and /home.
True, network boot is not best example. Shared /usr is much better one. For example if you are school that wants to buy 100 thin clients for very cheap.
Think about booting over network. Or having /usr on another drive. Including even network drive. Think about
dumb terminals(wrong cetury) thin clients. For example they can use small disk to quickly boot wihout downloading kernel and initramfs and use NFS for /usr and /home.These days, AFAIK network boot is done thru initramfs. It loads rootfs in most cases I’ve seen tho.
True, network boot is not best example. Shared /usr is much better one. For example if you are school that wants to buy 100 thin clients for very cheap.