Not necessarily. To move ADFs over quickly and easily, I'll sometimes hook up an external GoTek and move a batch of ADFs over to the hard drive depending on the Amiga in use. Once there, though, I'll mount all of the ADFs I want using Disk Mimic. It really does make using the GoTek for mounting ADFs virtually obsolete IMO.No need for an external Gotek now.
And let's not forget that you'll still need your GoTek to play games that take over the OS, or access the floppy drive hardware directly.