@Darksky Thanks for editing the ARM Unstable Update 2025.04.04 Topic 
I build new OS images (x86 & ARM) for several reasons :
_ To test the dedicated tool, if something go wrong during the process it is necessary for the community to report the issue to the devs
Build Images Bug Report, Thanks To the Devs to solved them :-)
Issue during build image process after manjaro-arm-tools update
x86
Build KDE Iso Failed => kpmcore5 and kpmcore are in conflict
Build iso issue to build image
And so on…
_ I don’t rebuild images after each update but often, if a device encounter an issue it is possible to install a fresh build OS.
_ I noted in the past some improvement between an update and a fresh OS install.
_ The Manjaro build images tools are awesome, you build your own OS ( nothing compared to the LFS => Linux From Scratch :-) what an advantage for the Manjaro distro, available for x86 && ARM