I think you misunderstand the intention. The parent comment is comparing uptime to their own system and declare superiority, and the one you reply to is asking

I think you misunderstand the intention. The parent comment is comparing uptime to their own system and declare superiority, and the one you reply to is asking the the opposite — the duration of downtime. Sure you can build your own infrastructure but don’t pretend that’s superior. Each has its pros and cons. The last line probably is making fun of their reaction — any person as dogmatic as the parent commenter would comment someone with their own infrastructure going down with that comment.