Is website caching still relevant today? [closed]

Is website caching still relevant today? [closed]

References

Reference NO 1

http://stackoverflow.com/questions/15165879/is-website-caching-still-relevant-today

Reference NO 2

http://en.wikipedia.org/wiki/Web_cache

Reference NO 3

http://www.mnot.net/cache_docs/

Reference NO 4

http://www.stevesouders.com/blog/2012/10/11/cache-is-king/

Reference NO 5

http://oreilly.com/catalog/webcaching/chapter/ch05.html

Reference NO 6

http://www.joedog.org/articles-bandwidth/

Reference NO 7

http://www.vicomsoft.com/learning-center/lan-based-web-caching/

Reference NO 8

http://www.netlingo.com/more/cache.php