Comment by raincole

> Engines are the easy part.

> The real meat & potatoes is all the tooling and content and asset pipelines around the engine.

When people talk about engines they often include the asset pipelines and editors by default. Engines today are not just a main loop + 3D API calls. Very few devs will say we're going to use Unity but only for its rendering code.

(Of course I'm not implying as long as you use Unity/Unreal you'll never need to write your own asset tools.)