I'm absolutely not an expert, but critical things for power and food production not to mention medical supplies and emergency equipment are also tied up pretty deeply in international trade.

The world would break pretty quickly if we all just stopped trading with each other.

Sure, but many products can be sourced from a load of countries.

If you can't get natural gas from Russia you can get it shipped from America or Australia or Qatar - it's expensive as hell, and you might need to quickly build new regasification plants, but your economy keeps running. And there's no remote kill switch that disables the gas you already have in-country.

That's not the case for the services provided by AWS, Google, Apple and Microsoft though - the 'competition' is one US provider vs another.