[cshenton]

I suspect (1) is just because Dear ImGui is BYO graphics backend, so it doing lots of clever texture management stuff for lots of images would increase the surface area of that integration which would make it harder to use for most folks.

[taylorius]

I would venture that 99% of people who use ImGui do not create their own graphics backend, but rather use one of the standard ones included (I use the OpenGL backend, for example). Creating a new backend would be more work, for sure - although I think that ImGui is already using textures for its font rendering - so perhaps some of that work could be reused.