Why should I even try to do this? If I would do ATMs or car entertainment systems I would look for stuff that is available in industrial temperature range (Edge is? – happy to learn that)
I know the maximum load my RK3399 devices get (yeah, including heavy networking stuff which does not increase temperatures BTW) and I want to operate them at reasonable costs, without moving parts and noise and with no wasted energy.
All I would get with Edge or Edge-V is an insufficient heatsink for my use case (since constructed to be only efficient when used with mounted fan) relying on a method of insufficient heat transfer from SoC to heatsink (thermal pad) so this use case simply won’t work with Edge or Edge-V or I would need to spend at least 20 bucks on something I don’t want or start to mill my own heatsink which I also do not want.
TL;DR: No appropriate passive cooling option provided for Edge/Edge-V which is not a problem since I probably can’t afford operating Edge/Edge-V anyway (at least I don’t want to spend 40 bucks just on a PSU per board). But fortunately this really is no problem at all.