I think Blender Internal is interesting for baking options that aren’t (yet) available in EEVEE or Cycles like the image-texture-to-vertex-colors-baking for the use with “Point Density Textures” or in the case of “Normal Maps” for the “World” and “Camera” coordinate system as references for the normal vector definition. Blender Internal also has an interesting looking bake type named “Derivative” which looks like “Normal Maps” shifted into the yellowish.
Blender Internal certainly still offers some nice artistic options and is also still interesting for people (like me) who’re interested in history. I’m sometimes thinking at all the hard work of many years that the programmers invested into creating and improving Blender Internal.
