great question--I have used both my computerized machines a number of times during the pandemic--my lightweight because the good machine in for maintenance which lasted longer than usual due to "sewing machine rush". But my two mechanical ones--the industrial and my original Deluxe machine don't get used as often--when I do dig them out I oil before use. I did pull out the Deluxe when my good Elna was tired from making 4 layer masks for the local medical center and my lightweight Brother travel machine wasn't tough enough. Amazing how small the harp to the Deluxe is! But other than no needle up/down which I dearly missed, it tackled the masks without issue!