I have a question/thought: Years ago I was told that the constant turning on and off of a tv, computer, other electronics was not good on them and it shortened their lifespans. This is due to corrosion that occurs when the inside metal parts warm up, then cool and condensation corrodes them. Which lead to the recommendation of leaving them on more or even all of the time, like most of us do our computers, now. Would the same apply to our sewing machines? Don't they have the same inner parts and components like computers and other electronics? Does anyone out there know anything about this?