Maybe you're right, systems these days are more 24/7 than they used to be seems like devs these days have had it so easy for so long though.

My observation so far is that businesses don't aim at 24/7 any more. Officially maybe, but not in practice - they accept the risks. Some downtime is less of the deal, if that means less staff and other costs.

It's a big shift in thinking, IMO caused mostly by people not opposing abuse more.