>The reason things like github go down so often is because they are public/shared resources.
Very much this. Managing shared resources at scale is pretty hard. We have a bunch of internal sites made by interns as part of their internships, and, funny enough, those sites have much greater uptime and appear more stable than our own multi-tenant SaaS solution made by seasoned devs.
If anything, a smaller company with smaller footprint and fewer total requirements is going to be more likely to manage a vertical slice of some SAAS product.
The reason things like github go down so often is because they are public/shared resources.