Image and video editing looks finite from the outside: a canvas, a few tools, an export button. That impression is short lived. An AI agent will give you a working canvas with text, shapes, layers and a PNG export in a day, and it will be good enough to demo. The problems show up later, when a Safari upgrade breaks text rendering, when a customer uploads a 400MB PSD and the tab runs out of memory, and when undo and redo get out of sync between two people editing at once.
Once an editor is in production, it stops behaving like a feature and starts behaving like infrastructure. This guide is a breakdown of who owns what once your editor is live, and what real teams have spent (in dollars, in months, and in attention) to find out.




