The youngest are now over 20 years old, what else do you expect?

There are very few that have never seen a welder, and those tend to be the lower millage examples, as said, so long as it's been repaired properly, there is no problem.

Tbh it will require further welding at some point, as you find once it's starts, your literally chasing it around the car, the only thing to try and prevent it is under sealing.

Martin