I had like... less than 10 minutes downtime on Hetzner in years (funny enough, that makes my personal containers more reliable than productionized AWS and GCP deployments with their constant partial outages). So perhaps all that complexity (beyond maybe a backup container) isn't really necessary for companies where a bit of downtime doesn't really affect revenue?

Like, I know Leetcode tells otherwise, but most companies really don't need full FAANG stack with 99.999% uptime. A day of outage in a few years isn't going affect bottom lines.