Is a string winder necessary to change guitar strings, or can you just use your hands?
Time saver for sure. But I think there may be some value to winding your strings by hand, at least until you know you know how to do it. There is a certain – elegance – to the ritual, for me anyway. Paying intimate attention to the equipment. Stretching the strings to their proper tension and focusing on the tiny changes that make the tuning correct. I miss that when I use the winder but of course, the job gets done quickly.