...when all the Telstra ADSL ads say 'Always On'*. With the asterisk being along the lines of 'there will be outages from time to time, deal with it, we're not obliged to have this thing running 24/7.'
When the ads tell you it's unreliable, you have to wonder. I haven't even enquired about getting ADSL at my place while it's in such a mess. (And due to living in an older place I expect I'd be 'pair-gained' out of ADSL access anyway...)