within SSIS is that while the data flow task tends to do a very good
job of keeping track of field name changes, the same cannot be said of
renaming variables. For example, if you had a variable, RowCount and
updated that to RowCountActual, you would then need to update all the
places that referenced that variable, like a Row Count data flow task,
the ReadOnly parameter list of a script task, etc.
Nothing major but an annoyance.