> If you think those nines include software upgrades, you are probably over optimistic.
If you advertise a product with a specific SLA, and you can't meet that SLA, you're a liar. Don't try to blame the victim because of inaccurate/untruthful marketing or engineering.
I used SLA to communicate an advertised/marketed level of service. In this case, I agree, that SLA is the wrong term as there is no contractual agreement.
Don't advertise it if you can't offer it then.
> If you think those nines include software upgrades, you are probably over optimistic.
If you advertise a product with a specific SLA, and you can't meet that SLA, you're a liar. Don't try to blame the victim because of inaccurate/untruthful marketing or engineering.