I think the issue is only a problem if it doesn't work, renders much slower or crashes a scene. The Corona Bitmap has more features, but it does cause some people some problems.
The biggest one for me was collecting a scene to be used on other system or Team Render (render form too) that used materials that had their texture maps stored in the Asset Manager. Those file names get changed to some random set of numbers in the collected tex folder and of course breaks the link. If you have a large scene with hundreds of materials, this is a massive problem. Even knowing it ahead of time and trying to change to C4D bitmaps in the material can also be a show stopper if you have lots of materials.