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

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 setting up and managing distributed servers if going from 99.0% to 99.999% gains you hundreds? If you need more nines and stronger guarantees than that, absolutely, use distributed solutions, nobody is telling you otherwise. Jepsen tests are valuable once you have decided to use a distributed solution. They showcase problems that would be extremely hard to track down in production settings but can cause serious problems there. If encountered in practice these problems can cause data corruption or other very strange bugs that would take days if not weeks to track down. I wouldn't say that a system with failures in Jepsen tests is unusable, every system has bugs, but if a system has these problems on purpose (e.g. to make it look better on benchmarks) and there is no movement to fix these problems then I would definitely steer clear of that system.