This has to have been discussed by now, if not here else where. A system is not cheap, it's heavy, and idk if the systems are automatic or manual. If I had to guess they are manual, accessible by the driver or an extra pull toggle by the passenger door. But what if you're knocked out? What if the cars burning also and they can't get to your toggle? At the end of this video you see fire suppression device under the hood. I was also thinking of installing 2 in the cab. Thoughts?
https://m.youtube.com/watch?v=HdXO2cDBjlA
https://m.youtube.com/watch?v=VkGGR1o9IC8