When I got my first Amiga with floppy drive, I never really looked back to those times when I had to use audio tapes. If you had a 'collection' of multiple games on one tape, you first had to wind it to the correct position. It took several minutes to load a game into the machine.
The downside was that it was uncomfortable. There have been floppy drive extensions and Sinclair's proprietary Microdrive solution, but audio tapes were cheap and ubiquitous, and cassette recorders could be found in virtually every household. The main way to load software into the ZX Spectrum was via audio tapes.