Servers absolutely do "go down", and it absolutely is an issue.
How this is even a discussion point is beyond me.
How this is even a discussion point is beyond me.
But is that an issue? Enough to pick a distribution model for your software product that divides your customer lifetime value by ten?
If you're that worried about it, you could always take some of those profits and hire a kid to carry a pager around and do that once a year reboot for you.