I agree that compared to other aircraft like the MD-80s and Boeings, the Concorde has a relatively small number of cycles.

However, what's to rule out that the concorde is not as durable a plane. Maybe they are starting to reach a point where reliability is going downhill.

The concorde is a very different type of plane than the subsonic planes, maybe different rules for judging reliability are needed also.

I'm not a aircraft safety expert, i'm just wondering.