design idea - potted

I've jsut been watching a friend try and re-pot a new plant.  The plant would not come out of the old pot, so in the end she had to knife down the side of the pot to free the plant, leaving a broken pot that no one can do anything with.  I'm sure its been done, but I cannot see why every pot used by gardening centres cannot have tabs that allow it to be splt and then put back together again.  The cost of the extra tooling could be amortized into the price of the plant, cutting down on long term waste by making something much more reusable.  With careful design the plant pot could still be one piece, to save pieces becomming separated and lost.