Wikipedia is an example of good website redesign: overall I think the new site is better and has some added benefits (TOC sidebar, fixed-width page layout) and

Wikipedia is an example of good website redesign: overall I think the new site is better and has some added benefits (TOC sidebar, fixed-width page layout) and doesn’t unnecessarily change or remove things. But Wikipedia also allows people to resort to the old style. Which I think is even better because it satisfies those who simply dislike change no matter what. And it also helps in case the new redesign is not so good… Overall I think customizability is the best, but it’s also the hardest because you must now support multiple styles and layouts instead of one. For a simple site like Wikipedia it is reasonable though