Every large site on the internet has talked about strategies around sharding. At some point you are surely going to hit the physical limitations of one database on one server.
He said "serious site". He did not say "large site". For example, techcrunch is most certainly a serious site. It is NOT large scale and in need of sharding.
Every large site on the internet has talked about strategies around sharding. At some point you are surely going to hit the physical limitations of one database on one server.