I spent 25 years flying 737-200s, right up to the time they were disappearing off the register. By then just about everything else was glass cockpit.
It was noticable that the more capable F/Os said that they were glad to get the chance to fly the old technology, as they felt it improved their basic skills. The less capable couldn't wait to get on an aeroplane where all they had to do was press buttons and act as system managers.