No, there are no advantages to the traveler.
If you fully intend to skip that segment, please, do not check in.
All you will be doing is creating more work for the Gate Staff, especially if the flight is full or near full.
Also, if you fully intend to miss the flight, don't pre-select a seat or, pick a really bad one, middle last row.
You will not accrue miles or points and the airline willdoes not receive the revenue when you check in.
The value of the ticket is still yours for perhaps up to 1 year.