My understanding is: Silicon Valley hires tens of thousands of the most brilliant, expensive engineers to write always-on distributed systems and to try and kee

My understanding is: Silicon Valley hires tens of thousands of the most brilliant, expensive engineers to write always-on distributed systems and to try and keep them alive with the data sort-of consistent. Enterprise does not do this. Your bank writes simple, naive, non-distributed programs. The operator of one super-reliable computer invokes the program and makes sure it runs to completion each night. When it is time to make a deployment or a database migration on an internet-connected service, they just declare a maintenance window and go down for a few hours. There's one big ole SQL database in normal form with joins and transactions.