这段文字强调了特斯拉（暗指“Tezza”）目前在路上行驶的数百万辆现有车辆所蕴含的巨大潜力。其核心观点在于，通过一次简单的空中（OTA）软件更新，这些车辆“几乎可以在一夜之间”被启用，作为“兼职、极度兼职或全职的机器人出租车（robotaxis）”运行。这一“消息”凸显了该公司利用现有客户硬件，快速而广泛地部署自动驾驶出租车网络的能力。

The provided text highlights the significant potential of Tesla's (implied as "Tezza") existing fleet of millions of vehicles currently on roads. The central point is that these vehicles could "essentially overnight" be enabled to operate as "part-time, super part-time, or full-time robotaxis" through a simple over-the-air software update. This "news" emphasizes the rapid and widespread deployment capability of a self-driving taxi network using the company's existing customer hardware.