Website maintenance

[mtbc]

It surprises me how common it is for a website to be wholly unavailable for, at the least, many hours, while being upgraded or otherwise improved. Surely it's often not too hard, perhaps with the help of temporary redirects, to offer a read-only view of the previous site in the interim? The new site may be great but even the old site is probably significantly better than no site at all at the time that one actually needs to use it.