Simplicity is a prerequisite for reliability.

I put those words on the wall in giant vinyl letters, and I point to them every time someone asks me "can you add a frontend button which checks this external API and stores the correlation between the amount of rain and the sales numbers of purple buttplugs inside the user profiles?"

People always ask for one more column in a table, one more paragraph under an image — they never ask for replacement or removal of items.

So I force them. Want a feature? Fine, if you point at something of equal or greater complexity to delete.