From the article Do Amish use technology?:
Amish see threats in technologies which provide easy contact with worldly ideas and values (television, automobiles), or those which may break down the family or community, by serving as distractions or eliminating the need of relying on others in one’s community. Amish also feel that certain labor-saving technologies take more than they give, robbing their children of the ability to learn the value of hard work, for example.
In some cases, after careful evaluation, consensus may develop around a particular technology, which may lead to its being adopted by the church district and incorporated into the Ordnung.