I believe the recent long downtime was a datacentre issue (will follow that up) - but they are rare.
Otherwise, our statistics show the server has been pumping out pages fairly consistently, with no obvious downtime, and a fairly stable pattern. The site is most busy on Saturday and at 5am-8am US EST daily, which means that if you're experiencing downtime, most of it is simply that the site is busy at the times you access the site (the times correspond to late afternoon in India, which is to be expected).
There's room for improvement, but I think you're overstating the problem. The vast majority of times a simple refresh solves things.