>>4426902
>let people add the extra size back on with a grip
The grip would need its own shutter button. They realized this back in the day when making power winders (pic rel). If you put a 'dumb' grip on a classic SLR, your index finger needs to stretch backwards in a weird way that is, besides subjective discomfort, objectively poor design as it would increase the time taken for you to adjust other settings with that finger (such as a front dial) and return to the shutter button.
In reality cameras should look like pic rel, except without the lower winder mechanism (so just the body and the grip section). A totally flat gripless brick is retarded besides specific cases like Leica M or compacts (and even then a shallow grip like on the GR/GXR series is superior and perfectly inoffensive). At the very least a camera needs a grip like that on the Pentax LX or Program A to not waste the user's grip strength on nonsense like trying to pinch the sides of one's middle and ring fingers against flat leatherette effectively 'gripping' with the knuckles rather than, you know, the parts of the hand actually made for gripping things.