I used Amiga 500 for around four years without external floppy drives and swapped like mad.
Then I got external floppy and I started replaying all the multidisk games of the past, again, because I loved playing with less swaps. Some games didn't support external drive, and insisted the disk to be entered in DF0: (Copy protection, lazy coding, coders not aware of possibility of extra drives and hardcoding everything to the internal floppy), but they were in the minority. The external drive made some games pretty much playable, which were unplayable with the internal floppy. For example King's Quest VI required more than 30 disk swaps to show you the intro screen.
The external floppy helped in productivity software and compilers as well.
I remember putting all header files of SAS_C that I used on single floppy which was on the external drive and I didn't need to swap disk to compile. Or I used external floppy with MOD files and I listened to them while programming.
The only minus of the external drive is that it allocated some memory. There are tricks to reduce the memory usage by lowering the buffers, but the best solution was to turn off the drive. The better external drive models had on/off switch on the back. It was useful for anti-clicking as well.
Currently I still use Amigas extensively, but I use external 1 TB hard drives.
