I wanted to ask this question a long time ago)
It is A very simple thing - modify any property for data object dynamically (product,category or something else).
Frankly I always used the observer class for this purpose.
But corresponding to a magento technical guidlines:
4.3. Plugins SHOULD NOT be added to data objects.
14.3. Events SHOULD NOT change a state of observable objects.
Can anybody explain how should I add timestamp, say, to the product meta_title property on the front conforming to these rules?
P.S. Please, do not suggest to change meta title in the template)
Let's assume, I need this modified meta_title in many places.
P.S.2 Formally the class rewrite (or reference) is a solution in this situation, but we know it is a bad practice overall and also it is too excessive to use reference to modify one property.