In the event of catastrophic data loss at Xero, you could at least take your debits and credits, transactions, invoices and other basic accounting data with you to another vendor. Sure, Xero adds plenty of application logic, but at the end of the day, it's just double-entry accounting.
I was an early adopter in the US. I've been relying on Xero and it's APIs for my business to operate since 2009! This is the first time I can ever remember an outage like this. There are definitely some things that annoy me about the product, but I understand that when you deal with a companies general ledger, you can't afford to "Move Fast and Break Things." I do not envy the sysadmins getting woken from their sleep right now.
Could IPv4 address exhaustion be staved by opening some of the currently unused /8 blocks? For instance, Apple has the entire 17.0.0.0/8 block. If IPv4 addresses are really becoming scarce and demand is going up, seems like Apple could dole out /24 or /16 bit blocks to RIRs and make some money - which they obviously like to do. So why aren't they doing it? Maybe someone more familiar with the economics of IP has an idea.