The answer describing floppy disks as 'notoriously unreliable' doesn't match my experience - and I started with 8" floppy disks before moving on to 5¼", 3" and 3½".
Over the past four years I have been gradually transferring material from 3" and 3½" floppies some of which have not been read since the 1980s and, much to my surprise, though a handful of disks out of several hundred were not readable, I didn't lose any data because I always had a backup.
Indeed, the only time I have lost data was when a hard disk or a CD-RW failed; I cannot remember ever losing data as a result of floppy disk failure.
That said, for most of the time I had a copy of Knife+ which I used to recover data on other people's disks - so I know it could get lost but only on a few occasions in over a decade and, on all but one occasion, I was able to achieve a full recovery.