Is Stretching good for joint & mobility?

The evidence points that way, though it's not yet conclusive. Meta-analyses consistently and robustly confirm that both acute and chronic stretching improve range of motion and flexibility, with recent meta-regressions clarifying optimal dosing and the underlying neuromuscular and mechanical mechanisms. That's reflected in an evidence score of 65/100 for its role in joint & mobility, drawn from 9 studies, with an estimated impact on longevity rated limited (28/100).