A bit late to the party. I’m quietly alarmed at the words “retire rendercam” as I’m actively using it, and loving it, in my projects!
I use Rendercam for 3D projects and Orthographic for 2D projects. A minimal 3D only camera sounds like a great idea to me.
To me, a well maintained camera extension is important in any engine. It’s one of those make or break things that newcomers are likely to immediately start using, and see as a core part of the engine. Having two options, Orthographic, which is superb, and its 3D counterpart would be ace.