And the next step after the Minimum Viable Treehouse is Treehouse 2.0. With skylights and a railing, but attached to the original structure made from two pallet

And the next step after the Minimum Viable Treehouse is Treehouse 2.0. With skylights and a railing, but attached to the original structure made from two pallets. With duct tape. Of course, in the real world the ugliness would be so overwhelming that such a beast would never be built. Too bad the same does not hold true for software :)