There are several proprietary TP dispensing systems that provide a huge roll (think up to 10-12 inches in diameter) with a large core that fits inside a given company's commercial wall-mounted dispenser and offers toilet paper until the cows come home (or at least the end of a work shift) -- which would never fit well on a home TP holder.
seems to me it could just sit it in the bathroom somewhere. I mean maybe one could roll it around an old TP roll although that might really be a bit much. But certainly it could just sit. But no instead we have to use paper towels if we can find them, or store flyer junk mail if we can't. I mean I kept a bunch of paper that came in packaging if I need it ... because it's better than junk mail. But most of those actually will clog the sewage system, as far as I can figure the solution might be to then dispose of them in the dumpster instead of flushing. All because they don't think we will buy big industrial rolls that don't fit on a holder? I mean maybe not if we had better choices. But we don't.

It's also (as most people likely would attest) not the same grade of paper or number of plies and some isn't even perforated into sheets.
that is true, although since usually I buy recycled TP it's not that different. Some of the recycled TP isn't that soft, not that multi-ply etc., which is good the soft stuff clogs too easy.