Thereafter, they began to be largely supplanted by computers. They have been largely supplanted by counterweight fly systems. However, they have been largely supplanted by solid-state devices such as the transistor. Purely water-based seaplanes have largely been supplanted by amphibious aircraft. Firearms have largely supplanted crossbows for use against humans. However, with the success of reality shows, news magazines have largely been supplanted. Petroleum extraction has supplanted forestry as the mainstay of the economy. He became an embittered critic of Margaret Thatcher, who supplanted him as party leader. A century later they were supplanted by the Uqaylid dynasty. A culture of megalithic temple builders then either supplanted or arose from this early period. By this time, the party had been almost entirely supplanted by the Whigs. Jupiter eventually supplanted his father just as the prophecy had predicted. It was eventually supplanted by the Gregorian chant in the 11th century. This has since been supplanted by the Latin alphabet in the 20th century. But by then, the faith had been supplanted by ascendant Christianity.