I'd find this feature very useful as there are so many use cases for this. And even more than just pictures, I'd allow screenshots.

I could definitely see myself using this to insert more readable versions of some of my calculations.

For instance, I could have this image (attached) immediately above below this line…

− (c_1 × m_1(t − t_1))/(c_2 × (t − t_2))

…which would help remind me of what’s actually going on.