It's probably just dealing with 2 old cars and 1 runs and drives. I might as well cash in the one with value and beat the hell out of the one I have short cash in. It would be nice to not have to leave the 90 out in the driveway also.Sorry to hear you have fallen out of love with the 70. It happens, I guess. More surprised you feel it can't be a reliable car for you. There are plenty of cars that age and older that still serve as daily drivers to this day. Plenty of older guys would even try to convince you they are more reliable than that modern electronic shit made today.
FWIW, I hop in mine as much as possible be it for a quick trip to the store to pick up milk or a three hour drive to visit family. I've long moved past the point I really even think about its reliability. This even after an abrupt alternator death some weeks ago.