The traction battery is the high voltage battery that runs the drive motor(s) of the car as well as keeping the 12 volt battery charged. Yes, it was very scary! However, you can just as easily be stranded for a myriad of reasons with gas cars too and I have lots of good stories for that also.
They are all machines. They have many parts and can break down. Quite usually breakdowns occur without much warning. You can somewhat prepare yourself with carrying some supplies with you. Flares, reflective triangles, flashlight, tools, jumper cables, cellphone, roadside service numbers, water, etc...
Fear can paralyze a person from living. A healthy fear of the unknown is normal. Reaching out to others and researching can indeed help calm some fears. The fact is though, every time we are in a vehicle on the streets, it is usually the most dangerous and possibly deadly thing that most of us do on a daily basis. We will never know how many crashes that we "just missed" being involved in.
As you know, we are not spit out into this life with any guarantees. Try to mitigate some of those fears with preparing yourself the best as possible. Gathering knowledge as you are doing is a great way to start. I expect that I will be broken down again, and that it is probable, in my book, no matter what vehicles I use, ICE or electric.
It really helps if you have a great roadside service like Tesla has. They will send help and service to you. It may take a while for one of their vendors to get there, but just be patient.
In my Tesla breakdown, I wish that I would have had plenty of flares and some reflective triangles. The 12 volt battery quickly goes dead when you have a traction battery fault. That means no emergency flashers or any lights.
Yeah...that 12v failure upon breakdown I’ve heard about before. Some good thoughts.