> Then you look at a big company like meta or Google and they're churning out systems that pretty much work and at huge scale..
They are but they also have a margin for breakage that, e.g., the NHS doesn't really have. If your Facebook or Instagram feed is missing everything from the last 3 days because a node went down, they can fill that in with other stuff and you might not even notice. Same with stuff missing from Google Search, etc. If stuff is missing from your medical notes because a node went down, that could be fatal if you're just about to have a procedure done. Same with, e.g., tax records, police records, etc.
I guess financial institutions are the better option (but again they still have a bunch of "reconcile stuff at the end of the day" options that don't necessarily translate to the NHS et al.)
I think if you saw the volumes of emails sent inside a trust from IT saying that things were down or back up, you might be surprised. Google and Meta have insanely better track records and standards for themselves, because they have more money and more of an incentive to be working. Meta created a planet-scale messaging service which just went live and worked straight away under full load. They have insane testing ability and desire.
They are but they also have a margin for breakage that, e.g., the NHS doesn't really have. If your Facebook or Instagram feed is missing everything from the last 3 days because a node went down, they can fill that in with other stuff and you might not even notice. Same with stuff missing from Google Search, etc. If stuff is missing from your medical notes because a node went down, that could be fatal if you're just about to have a procedure done. Same with, e.g., tax records, police records, etc.
I guess financial institutions are the better option (but again they still have a bunch of "reconcile stuff at the end of the day" options that don't necessarily translate to the NHS et al.)