For regular folks, you're correct.. there's no need to use floppies for anything going forward and there hasn't been for a long time.
However, floppies are still used in the vintage computer hobby. There's a number of new solutions that allow old systems to utilize newer medium, but not all systems have solutions yet and so floppies are still needed. Floppy drives are also still needed to archive historical medium (usually found in attics) by reading in the disks and saving the data to a modern solution. For those needing to read/write floppies on modern computers for archival or vintage computer purposes, look into getting a greaseweazil which are about $35 and it can read/write many formats of floppy disks. i wouldn't bother with those USB floppy drives, they have very limited use cases that don't really exist anymore (writing a generic 1.44mb pc floppy disk that can usually only be read on other machines with a similar 1.44 drive).