I agree that Enterprise jobs should not use SSIS but use custom .NET code for importing and exporting complex file formats. We only use SSIS for one offs that can be ran manually. All other type of data integration tasks we use MS queues that call custom .net code. SSIS packages break frequently, our custom .NET code has been running 24/7 for 8 years without error (other than network outages) and processing millon of dollars in payments.