As a solo bootstrapped SaaS founder who literally relies on my app staying online to pay my rent and food, I chose NOT to use the cloud, even though I have 6 figures in cloud credits. I use the credit to spin up a single beefy baremetal instance and manage my own services. It's because I realized the cloud was based on a false promise which seemed possible a few years ago, but I now realized is impossible. There is no such thing as a "fully managed" deployment where you don't have to think about servers. See also: self-driving cars -- very easy to build a toy demo case, fails catastrophically in the real world. The cloud promised to save us time on managing, deploying and scaling servers; except in my experience: it doesn't. You spend just as much time, if not more time, dealing with the scaling issues of managed databases and "app engines" as you do SSH'ing into your server. Except it's worse because you lose touch with reality and have a very poor understanding of what your code is actually doing.

Last week my choice was vindicated: I ran into a critical hardware issue on my linux instance which required a complete OS reinstallation. Wiped my server clean, and was back up and running in an hour. I feel much more secure in the fact that I KNOW I can spin up a completely functional version of my app on any Linux server in the world in less than an hour, rather than relying on opaque cloud backup/load balancers/serverless configs which could fail in unexpected ways, and are usually locked in to a particular vendor. As for a few hours downtime here and there, my business is designed to handle it.