F43 を新規インストールすれば、また5年戦える
https://discussion.fedoraproject.org/t/f43-emergency-change-proposal-acceptance-2g-boot-partition-system-wide-change/167587

Firmware is getting bigger, initramfs are getting bigger, and boot volume size is not getting bigger. The last time it was changed from 500 MB to 1 GB was 2016.

The motive for the change is having a big enough boot on new clean Fedora 43 installations so they can be upgraded for 5 years.