> From there on, I’m too scared to make changes to the 20-line function that produces the updates to be sent. Given enough regression testing coverage, any loa

> From there on, I’m too scared to make changes to the 20-line function that produces the updates to be sent. Given enough regression testing coverage, any load-bearing function can be changed. This sounds to me like your project had insufficient or non-existent software quality practices to let this slip through. Hopefully your team has done a post-mortem analysis to make this a learning experience.