Worse than that - if just the foundations are bad, you may have to start the house over. Even if the house is fine but you get the wrong type of mushroom in the

Worse than that - if just the foundations are bad, you may have to start the house over. Even if the house is fine but you get the wrong type of mushroom in the wall of 1 room, the house will have to be rebuild. Strange analogy by GP, you have way more possibilities of fixing stuff in the software world than in the physical one.