Consolidate Add > Mesh > "Plane" and "Grid" into a single primitive

But here's the question: Should it be a plane (no subdivs) or a grid by default? My guess is plane, since plane is pretty much the highest on the add mesh list, suggesting it's supposed to be used more than plane.

Either way I think you can tweak the defaults anyways, so that's not that big of a deal.

Let's take this a step further and also merge the cube. After all, a plane is a cube with no Z depth.

Here i realized something interesting, after seven years using blender(heavily) this is the first time i saw there is a grid primitive, why is this interesting, because for me its not a hobby, i work with it and study it and somehow this primitive had gone under the radar, i look many times for a subdivision option under the plane and the last resort was to subdivide the plane to get the grid. On one side i like the idea of having the subdivisions option on the plane, one less object in the list making it smaller, this also can be extended to the cube that also doesn' t have subdivision. On the other side, keeping in mind that blender by default, not sure the historic reason why, doesn't show the subdivision edges on planes and also its turned of by default the option to display it, the user its kind of obliged to go to edit mode to see if the subdivisions for the task work, i use the word obliged because its the fastest way to check the other way to check this its five clicks and half monitor away, for a hobbist this is trivial but working with it its a big difference in speed just tab/pie menu into the edit mode to verify and then delete or subdivide.

Here's the difficulty (and perhaps it's merely a matter of documentation):

• If the two primitives were merged and just called 'Plane', it's not particularly obvious that there'd be controls for X/Y subdivisions. Most folks would (and many still do) just add the Plane object and manually subdivide in Edit mode.
• Conversely, if the merged object was called 'Grid', it would be more obvious that there are controls for subdivision, however , most people working in 3D are used to looking for a Plane primitive to add to their scene... not a Grid primitive.

My guess is that this is the most likely reason the two were never merged. Again, this could probably be solved on the documentation side of things, but they're concerns worth considering.