Not sure if you saw the bridge I restored earlier in this thread but it just has so many parts to it. Each saddle has a hex lock once you intonate it. It also has a front piece of each saddle that can manipulate the string spacing but doesn't sit flush if you have it off center. Then each saddle is attached with a set nut from the bottom side of the bridge but you can't over tighten it, otherwise the saddle won't move. Once you remove that nut, the saddle is sitting on a tiny brass nut with a nylon washer behind it. Those are screwed onto the intonation screw. One of the nylon washers broke into pieces when I removed everything and simply couldn't find anything that tiny to fit so I did my best gluing it back together to get it to function.
All in all it's just way over engineered which is why bridges are so much simpler nowadays. If you keep it in good condition and not have to take it apart I'm sure it'll never be a problem except for that nylon washer. If your intonation is off really bad suddenly, I'd bet it broke under the saddle. I wish I took pictures with all the pieces when it was taken apart.