SRE, at least as it is applied at the companies where I've worked, isn't about increasing uptime at all cost---it's about hitting some reliability (or other) ta

SRE, at least as it is applied at the companies where I've worked, isn't about increasing uptime at all cost---it's about hitting some reliability (or other) target given a long list of constraints. A lot of things are possible if your service can fit on a single box, but (at least where I work) that would usually violate some constraint I have.