In my opinion the blender-render tag has become problematic.
This tag has become (or always has been) one of the most misused tags we have. People are adding this tag to new questions simply because it mentions rendering and not because it relates to the actual render engine. I have this as one of my watched tags so I edit the tag out as the questions come in or leave a comment when it is unclear, but it is being misused nearly every day and sometimes more:
(Note: These are just my edits of the tag, I don't know if there are more by other users.)
- Is it possible to convert any mp4 file to hdri format to use in blender background
- problem with insetting faces
- Rendering from command line script that allows specifying which camera to use / render with
- Nodes, undesired pixel/glitch effect
- Why does my render layer node not have the expected number of outputs?
- Missing elements while rendering an image in Blender
- Blender 2.81a cannot render anything
- Blender crashing [Update on my old post] (came in as I was writing this)
The tag was actually renamed from blender-internal to blender-render because originally it was being misused. You can see the discussion here. I don't know how badly it was being misused at the time, but it's pretty bad at the minute. It was brought up at the time (in the comments, by David) that this could turn out to be a problem, and I think I can safely say that it has.
I don't entirely know what the solution is - whether changing it back to 'blender-internal' would at least reduce incorrect tagging, I don't know. I don't entirely like this option as the official name is 'Blender-Render', but I don't know what it could be renamed to. Even if we decided that this is a special case where it should have 'engine' in the tag (blender-render-engine), new users would probably still misuse it, thinking it refers to all render engines in Blender.
Regardless, I think we need to discuss what could be done to reduce its misuse.