Next step might be to have the SD card store only the bootloader, and have said bootloader load Linux into RAM from one or more floppy disks. Don’t know how sm

Next step might be to have the SD card store only the bootloader, and have said bootloader load Linux into RAM from one or more floppy disks. Don’t know how small you can make Linux but for example there is https://hackaday.com/2020/07/08/the-latest-linux-on-a-floppy-in-a-486/ https://hackaday.com/2020/07/08/the-latest-linux-on-a-floppy... and also there are some Linux distros for routers etc that can be made very small such as OpenWRT