Cloud providers and even cloudflare go down regularly. Relax.

Sure - but when AWS goes down, Amazon fixes it, even on the weekends. If you self-host, you need to pay a person to be on call to fix it.

Not only that. When your self-host goes down your customers complain that you are down. When AWS goes down your customers complain that internet is down

AWS doesn't have to pay people (LOTS OF PEOPLE) to keep things running over the weekends?

And they aren't...just passing those costs on to their customers?

They are of course, but it's amortized over many users. If you're a small company, it's hard to hire one-tenth of an SRE.

Not every business needs that kind of uptime.

How often is GitHub down? We are all just fine without it for a while.

I mean, yes, but also I get "3 nines" uptime by running a website on a box connected to my isp in my house. (it would easily be 4 or 5 nines if I also had a stable power grid...)

There's a lot, a lot of websites where downtime just... doesn't matter. Yes it adds up eventually but if you go to twitter and its down again you just come back later.

"3 nines" is around 8 hours of downtime a year. If you can get that without a UPS or generator, you already have a stable power grid.