"If you're working on a multi-developer team, or someone else might have to work on or try to fix your code later, please use structured objects, not Maps." Or

"If you're working on a multi-developer team, or someone else might have to work on or try to fix your code later, please use structured objects, not Maps." Or pick a language in which the difference is an implementation detail, where an object defaults to a bag of data, but getters and setters can be transparently substituted when it becomes necessary.