I’ll add a controversial opinion, specific to programming an application: Premature Abstraction is the root of all evil. Don’t panic! The code will be a mess

I’ll add a controversial opinion, specific to programming an application: Premature Abstraction is the root of all evil. Don’t panic! The code will be a mess. Let is be a mess. Don’t abstract too early, or the eventual mess that regenerates will be even worse than without an abstraction. If a part of your application or assumptions in a piece of code haven’t changed for 12 months, then abstract that part of your application. However, only abstract the bare minimum.