Both the Splendor and Liberty engine room fires left the ships nearly powerless. I know next to nothing about ship engine rooms or power systems so my comments/questions are purely out of ignorance.
I have always assumed that modern cruise ships would have port and starboard engine rooms separated by a firewall each with separate fire suppression systems. I know with even the most redundant systems there must be a cross over point that can be a single point of failure. Nevertheless, you would think the remaining engine would be sufficient to provide basic hotel services.
A Bad Day At Sea [with power] Always Beats A Good Day At Work
Carnival: Glory 2004, Destiny 2008, Splendor 2009, Freedom 2011, Valor 2012, Dream 2013
Celebrity: Summit 2011
Princess: Ruby 2010, 2014, Caribbean 2013, Coral 2014, Regal 2014
Star Clippers: Royal Clipper 2015