It took me a while to figure out why I love sewing on the 1941 Singer 15-30 versus all the other machines we have around, no high dollar ones with perfect tension, etc.
Its the sound. Best I can tell without research is that it sews in A sharp. The New Home is E flat and I might as well be grinding corn.
I wonder if manufacturers are onto this?
Should mention we come from hillbilly musicians.