The code is as complex as your business is. If your clients want these tweaks, you cannot get back to your sales department and say "no, we will not do it, it w

The code is as complex as your business is. If your clients want these tweaks, you cannot get back to your sales department and say "no, we will not do it, it will make our code base too complex". You either introduce some abstractions, or lose that $Nmm contract.