also less USification would help, it's not common knowledge how US birds or bridges or hats look like

will add more cards, thanks for the feedback

I've already seen a couple of train hotspots respond locally to pings directed at 1.1.1.1 and 8.8.8.8, apparently in effort to convince devices that they are on a good network event if the internet itself is broken due to being in the tunnel.

Or brouter with custom weights also has a lot of tuning points

Boarding passes don't need to be secure anymore (as since 2008 non-electronic tickets went out of business [IATA Ticketing Handbook, 39th edition, p.29]), they are mostly pointers to DB and the scanning point makes list of passengers so double use is discovered. There is enough data to process them fully offline for failure modes, but that's fallback.

In EU normally BIOS startup screen is the point at which they wave it as ok.

I've only had it a couple of times, BIOS was enough. Very good as the battery in that machine was shot and it couldn't actually boot. (I always used it plugged in, it wasn't worth the cost to fix.)

At least in Europe, except for the largest airports, the start slots are well organized enough that the taxi+wait time is just enough to warm up the engines, eliminating the saving.