Re: Rolling update causes outage
If I had to make a choice, I very much would prefer a few-hours long outage where no data is actually lost (only the processing is delayed) as opposed to whole day, or even whole week, outages where unfinished transactions are dropped on the floor. Something that more traditional institutions "excel" at - banks and airlines alike.
If anything, this outage has proved that Monzo knows how to deal with an outage and how to communicate with customers. Again, older banking institutions put to shame in comparison.
EDIT: in actual agile environment "lessons will be learned" actually means what it says on the tin. Especially in a new institution, which almost by definition is in "learning mode" all the time. There is hoping that with this, relatively small, outage Monzo will have learned to appreciate more through integration testing.