Why can't we just keep the same system

It was working pretty well for me. It seemed to also work for Bilt. We not just keep this one card and make some small changes incrementally? If you want to replace milestone rewards with Bilt cash? Fine. Want to tweak rent day bonus? Fine. But why do we have to get a new card? Why do we have to deal with all these other changes. The previous system worked for me. I pay rent and buy bananas and get points. Why change?