Don't want to drift too far, but I often ponder how some people would survive if GNSS didn't work for a day or the internet didn't work for a day. Just a day.
I've pondered this on a serious level, as part of my 'what ifs' list. What if I'm in IMC and the GNSS system shuts down, what alternates with ground based aids will I have, what separation standards would be applied with ADSB being down. Where would I go if we are down to minimas and I'm facing circling in IMC off an NDB with no distance or situational awareness from GPS based maps and equipment at night. How many feel comfortable that they have a plan for that and are current enough to safely do it. It's a very unlikely scenario but it is possible.