Our data centres have two power feeds, UPS on one of the legs, and backup diesel generators.

Network is resilient via fibres in different directions.

My laptop has a backup UPS built in. If wifi breaks, I can tether off my phone.

Power, ISP, UPS and Generators have all failed, but none are as ropey as slack (At least in the west - we had power issues in our Kabul officer earlier today, although even then slack has more outages than that)

If we’re going to extremes: why not outsource having a CEO? I mean. A company that gives you a managing director or chief executive can do so with far more availability than just one guy!

But really. Your statement is absurdist, critical infrastructure doesn’t have to be outsourced. It’s a choice and there are trade offs.