My family, DH, DS and I, as well as my husband's parents live just over an hour away from MIL's only living sibling. Aunt R and her husband Uncle W refuse to drive any of the distance, not even to meet halfway.
They are retired, they spend their time puttering around the house and doing what they want, which is fine with me. But every few months, they want to meet for dinner, or to see us or MIL and they will never drive more than 10 miles from their home. They just bought a new vehicle, so having a reliable vehicle is not the reason.