That advice only applies to a narrow set of functionality within the organization though. It's usually not cost effective or wise to write custom marketing syst

That advice only applies to a narrow set of functionality within the organization though. It's usually not cost effective or wise to write custom marketing systems if you can get one off the shelf. Your teams turnover rate, documentation, support, and feature creep all contribute to the maintenance of that system. No way it makes sense in the short or long term for non-core business functions.