Do these transmissions just fail all at once? This one drives ok for 207K miles.
It can happen, you'll probably at least be able to drive home though.
My parents had a 1990 Taurus that needed a transmission by 1996/7 and probably under 100k. I don't remember anything catastrophic happening the first time, so it was probably just slipping, but drivable. When the replacement trans went about a year later in late 1997 it was more sudden. My dad took me to go pick my sister up from college about 4-5 hours away. Going there, the car was totally fine. On the way back we hit heavy traffic close to home and the transmission started acting up bad. My dad pulled over and checked the fluid and I remember it looking chunky and metallic. The car was able to limp home barely. The next day my dad tried driving it to the Ford dealer, and it stopped dead in the intersection next to the dealer and got pushed the rest of the way. It was traded in on a 1998 Contour SE that was actually a really good car until it got wrecked. Ironically the Taurus outlived the Contour, I saw it years later around 2006 in a parking lot walking distance from where it died.