I wouldn't generalize too much. I once took a job where a $50 million in revenue a year business was running on a single AWS server that included everything (we

I wouldn't generalize too much. I once took a job where a $50 million in revenue a year business was running on a single AWS server that included everything (web, database, cache, etc.) with no backup of the data and the server was hand-maintained. It was truly a disaster waiting to happen.