Do older Scottish Folds tend to become more sofa-side companions than toy-chasing gremlins?

Yes, that's generally the pattern with Scottish Folds. As they age past 6-8 years, most naturally shift from the wild toy-chasing phase to a more relaxed, observant style. Their folded ears are linked to a cartilage issue that can also affect joints, so older Folds often prefer soft surfaces and gentle play. You'll still get bursts of activity, but the daily sprints and pounces become shorter. That said, they remain affectionate and will happily supervise your every move from the sofa cushion next to you.