The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at or repair.
Easy, just knock the boot off every 6 months and check.
Those prone to rust show up early and can be watched.
Rust is down to poor maintenance not the boot.
Time for annual visuals....
<ducks for cover>
Those who think they got away with things had better watch their backs
.“Life should not be a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside in a cloud of smoke, thoroughly used up, totally worn out, and loudly proclaiming "Wow! What a Ride!”