It’s because the outage went on for a very long time (over 24 hours to get Outlook operational again!) and more and more companies continue to migrate critical services to “the cloud” (someone else’s computer) because Microsoft convinced company leadership that it’s “more reliable” and that relying on a single vendor for everything is totally okay and can never go wrong.
So many companies don’t think about hot/warm spares or multi-vendor failover strategies any more because they outsource their thinking to Microsoft or Google. I’ve seen plenty of cases where companies were only able to recover from major issues because they had fully redundant backups or failovers at another vendor (one example - in this case they did it right, with multi-region redundancy on Google Cloud in addition to full backups on AWS - so they were able to recover from Google accidentally deleting all their data)
It’s because the outage went on for a very long time (over 24 hours to get Outlook operational again!) and more and more companies continue to migrate critical services to “the cloud” (someone else’s computer) because Microsoft convinced company leadership that it’s “more reliable” and that relying on a single vendor for everything is totally okay and can never go wrong.
So many companies don’t think about hot/warm spares or multi-vendor failover strategies any more because they outsource their thinking to Microsoft or Google. I’ve seen plenty of cases where companies were only able to recover from major issues because they had fully redundant backups or failovers at another vendor (one example - in this case they did it right, with multi-region redundancy on Google Cloud in addition to full backups on AWS - so they were able to recover from Google accidentally deleting all their data)