The interfaces nobody could see
A landscape had its integrations spread across file drops, direct connections and a few flows in Integration Suite, and failures were found by finance when a payment did not go out. We brought the interfaces onto one integration layer with monitoring and alerting. Failures are now caught by us in the morning, before the business starts its day.
The launchpad that stopped after the upgrade
After an S/4HANA upgrade the Fiori launchpad simply stopped working and users were locked out of their apps. The obvious causes checked out fine, so we went through every transport applied during the upgrade. One had quietly reapplied an old launchpad template through the upgrade adjustment, which broke how the new support pack applies the theme. Restoring the standard template fixed it; upgrade adjustments are now reviewed before go-live, not trusted.
The flow that failed every night
An integration flow errored on the same step most nights and was restarted by hand each morning. We read the error log properly instead of restarting: a partner system was returning a changed format after their release. The mapping was corrected, retries added for the transient cases, and the morning restart disappeared from the routine.