The Difference between Act 3 and Act 4 in Path of Exile

Although progression is important in MMORPGs like Path of Exile, it is more than characters Leveling Up and getting stronger, that is what most players should think about. Also, there is the process of transitioning from one place to another, increasing the difficulty along the way. Although this is straightforward and linear in most other RPGs, it has a little different when PoE is concerned,