1. Replacement link
I ordered a spare master link because one of the o-rings on my chain has a piece sticking out. It’s not the entire o-ring but just a little hair of rubber. The chain only has about 4k on it so I figured if it got any worse I’d change out the link with a master link. Definitely wouldn’t do this with a clip style link but I would have no issue running an entire chain made of master links if they were all riveted correctly.