On any ship getting out when the whole top deck is on fire would prove extremely difficult.
As I said, they have had a very good safety record until now but this tragedy changes everything.
They're never going to carry on without making safety modifications to these boats.
It's going to cost them upfront with modifications. Redesign will decrease the number of tourists per voyage but they can charge more.
After this, people are going to need to be reassured they will be safe.
After the Las Vegas MGM Grand fire in 80's, new codes were required for hotels.
The same thing is going to have happen here or few people are going to take these tours.