Might be because the big names are from their first decade, and in the last decade they focussed more on integrating companies, or are still working on making a

Might be because the big names are from their first decade, and in the last decade they focussed more on integrating companies, or are still working on making aquisations a success. Google Maps and Earth started from an aquisation. Youtube was right out bought by them. Google Groups, Picassa, Blogger, Google Docs are more, though a bit less successfull.