Womble

While grid interconnections help, there is still a problem of weather not drastically changing at country boundaries. So for example Europe currently looks like this:

and has looked pretty much the same since the start of the year.

So very little solar production is going on anywhere, that leaves wind as the only active intermittance source, so places that have a lot of wind production like UK and Denmark use all the wind they produce, and countries that make less power from wind and more from solar have nowhere to import significant amounts from.

You need either dispatchable power (gas/nuclear) or long term grid scale storage (multiple weeks worth) to make a power grid work. Currently the latter is prohibitavely expensive so the former is needed.

Im not misunderstanding at all, but do you really think governments make multi-billion dollar purchaces without having technical experts go over things with a fine tooth comb. Again if only one customer nation, of which there are dozens, found something like this or if it was ever used, it would wipe out the entire export market for US high tech weapons, why would they do that when they have effective soft power ways of achiving the same thing?

Do you honestly think that all the countries buying these planes havent inspected them? Even if they were incredibly well disguised the chance of them being discovered would essentially stop the US from selling military hardware abroad again as it would be hard proof that they couldnt be trusted.

There is no reason to do that when, as others have pointed out, they can just restrict access to parts, updates and mission planning software.