Yes, for example this week I had to uncover a bug why a backend was occasionally delivering duplicated database rows to a frontend, in code I hadn't written. I

Yes, for example this week I had to uncover a bug why a backend was occasionally delivering duplicated database rows to a frontend, in code I hadn't written. I couldn't replicate the problem in test, or in dev, it was only in prod and stage (because the data in stage and prod was the right shape to trigger a UB wontfix in the postgres query optimizer). Rust would not be friendly towards producing a RCA on this issue.