xinternet (9/3/2015)
SQL2005 is EOF April 2016. It's on Extended Support. So not accurate to say "... old, unsupported ..."
For a TB+ sized data warehouse there is more of a strong and compelling reason to upgrade than there is for an application database that hasn't seen an increase in daily usage since it's deployment back in 2005.
"Do not seek to follow in the footsteps of the wise. Instead, seek what they sought." - Matsuo Basho