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I'm not sure how those are comparable. Most people don't need extreme HA for their websites. It's totally fine if a standard webshop goes down from 2AM-3AM, or if a personal blog is down for a minute because an S3 VM crashed and needs to be rebooted. Most websites are not Google or Amazon, and gain very little from more 9's past the initial 2~3, which is totally manageable on a single server. Why spend thousands sett…
Yes, people should evaluate ha needs in terms of business needs: what happens if my website goes down? Will I lose money? How much money? "How much money?" Is probably the most import question, as it actually helps in evaluating if there's a business case for investing into the financial commitment, engineering effort and maintenance burden of an ha solution. On a different note, I've seen mysql-based multi-master se…
Edit: there is also more to be said about this. I'd research crawl-budget if you're interested.