Old things in Thailand



When I walked to the toilets of the school in our village I was not very impressed by the quality and hygiene. But when taking a piss I saw the old toilets and I was very happy they were not in use anymore. What reminded me of the fact that you see many times a new building (house / temple / bridge / toilets) with the old one still next to it. Why? Too lazy to take the old one away? Or is there a cultural thing about not demolishing the old one?