To answer the original question, the Seneca and Seminole are twin engine GA aircraft that are built for travel and touring. They are built to be stable in flight and not to carry high G loads. They are more agile than a 737, but less agile than a Stearman or a Waco.
The Seneca travels about 170 knots and the Seminole about 140-150 knots.
Also, I don’t believe they are “abandonware.” They haven’t been updated for a while but neither have many default Asobo planes. They are still being sold and being flown. They’re very nice planes.