Changing instances to arrays. So we've all had this issue:

Option 1 was the most flexible and abstract option where a lot of functionality could be built on this.

Option 2 was the fastest solution, that would solve only specific problems.

The whole Agile philosophy points to option 2. The problem is that clients will always want to add that functionality in option 1, and changing requirements makes us lose time, the precious resource that managers supposedly cherish, yet they always want us to choose the fast option.

We're at that point where the client wants to add functionalities, but since we already built with the previous requirements in mind. Ugh.

Changing instances to arrays.