My house was built in 1900. Oak framed. When I bought it the original shake shingles were there on the roof and three layers of asphalt shingles too. Roofline was and is straight as a string. No way would that be so with a pine framed set of rafters. Oak is a PITA to deal with in a lot of ways. But for strength, there's an old saying about being as strong as an oak. It's true.