I was having this conversation with my daughter and thought it was an interesting topic.
If an EMP or solar flare took out everything electronic in the whole world (permanently), how long do you think it would take for you to die, given your current location and circumstances.
I believe my daughter thinks we would live a lot longer than I do, but she is thinking about how long she can live without the internet while I am thinking the world will quickly descend into anarchy.
With no traditional forms of transport, so supplies would dry up, limited resources, health etc, law and order would be a challenge as things become more desperate.
I think I would live for about 3 months. I would try to get the family somewhere safe and remote and come back later, but I think most people would have the same idea.
If given enough notice to store water and fill 3 good coolers with ice, longer than 2 weeks - we lost power for 2 weeks with a hurricane once and had an electric well pump so no water either. Had set up a system with one cooler allowed to be opened, the others not often. By 2 weeks the water that we’d filled the tub with (for washing not drinking - water with a little bit of bleach) was getting questionable.
Like you, I think the biggest issue would be people.