Thank you for explaining exactly how and why mostly “best before” dates are appropriate for mass-produced pickled goods. “Best Before” is a quality mark, not a food safety mark. A dodgy looking old pickle is unlikely to kill you but it might not look the best or taste as be good as it should.

Homemade stuff, like kimchi rotation, is learnt through experience, so a “production date” might be more appropriate for writing on the jar.