Think first, rearrange later

"Sites get re-arranged regularly, especially sites for technology gaget companies."

That's nonsense. Well OK, its a true statement but its STUPID action, which amounts to the same thing.

If the URLs are properly thought out and the sites properly managed, then there is absolutely no reason why a permanent placeholder URL should not be assigned for any particular purpose, marked as "essential" and preserved for ever more to redirect to whatever page may be assigned to serve the content.

There's nothing worse than incompetent web sites such as Microsoft's continually and unnecessarily rearranging their content onto new URLs so that half the links are permanently broken.