Yes, some organizations still use T1 lines, although they are less common today due to advancements in internet technology. T1 lines were commonly used in the past for high-speed internet connectivity, but advancements in technology have made them less popular due to their lower data transfer rates and higher costs compared to newer options such as fiber-optic and cable internet. Today, T1 lines are primarily used in specific situations where a dedicated circuit with guaranteed bandwidth is necessary, such as in remote areas. Some businesses also use T1 lines for backup connectivity.