No, and no.
But it is nice when your phone and your computer do it automatically. The clock in my car… let’s just say sometimes it takes me six months to get out the manual and figure out how to set the time.
And no, DST saves energy and makes it easier to work those 12-hour days, and the only cost is Arizona congressmen constantly complaining about DST. (Indiana doesn’t like it either, so Mike Pence is totally in your corner!)