I am a big believer in nvme for desktops and servers. if well implemented, laptops, too. cars - the jury is still out on that.
and unless the usb-nvme bridge adapter chips got better over the last year, they were *not* reliable and they also got quite hot, in addition to the nvme stick getting hot.
the car writing to usb and then usb writing to nvme - that's a trickle of data and so it won't truly heat up the nvme stick so much. I don't remember how much power the bridge chip took, just sitting there, but I think it was non-trivial.
I just don't trust the first gen of those bridge chips. and I really don't trust the el-cheapo connectors that mate with the nvme pcb fingers, from the low end $30 usb nvme adapters. I did try one a year ago and *wanted* to like it, but I returned it due to heat, lockups and data loss. I can't tolerate any of those 3, let alone ALL 3.
fwiw, at a project at work (for a car), I was actually pushing to use nvme memory, optionally in software RAID (could be reduced to JBOD if you had just 1 stick) - and I could not 'sell' the idea to the guys in the upper floors. too pricey, not 'car rated' (I know, some people will want to flame about that, but flamers will flame, I guess, lol). cost of socket is a lot and reliability is not there, yet. not for the heat, cool, vibration, dust, moisture needs that has to be passed before a car oem will put such a part in their design.
so don't get me wrong, I really love nvme and its concept, but I still caution its use in the car and think for dashcam use, its overkill.
but - on the other side - having a super fast read speed (which the nvme does give, if you go native and not usb-based) IS nice. copying off the media should be fast.
cert talks about editing ON the media. not smart, guy. you want to consider the media 'read only' and copy data OUT of it, to a safe place (other nvme or ssd or hd). from THAT, you can edit all you want. consider the usb drive that came out of tesla to be a once-in-a-lifetime recording. for such things, you treat them as read-only and NEVER write to that media until you have 'rescued' (copied) your fragile and oh-so-valuable data off. that's the best way to ensure that you don't risk the originals. writing is risky, reading never is - that's the general idea.
hth