One can make one's own boot disk (typically done to prepare for when the system won't start properly).
The process is vulnerable to abuse; data floppies could have a virus written to their first sector which silently infects the host computer if switched on with the disk in the drive.
The most commonly available floppy disk can hold only 1.4 MB of data in its standard format, making it impractical for loading large operating systems.
The use of boot floppies is in decline, due to the availability of other higher-capacity options, such as CD-ROMs or USB flash drives.
Apple silicon Macs display the Boot Menu when the power button is pressed and held, the older Mac computers with Intel processors will display the Boot Menu if user presses the ⌥ Option or Alt while the machine is starting.