If you are a troll, what bridge do you live under?
If you are not, please know that I have been asking myself the same question in my search for a new boat. Where are you? What are you looking for? What is your budget? How long do you plan to own the boat? Do you work on your own boat, and if so, what is your level of experience with these materials?
I am surprised how little regard the steel boats seem to get from experienced people on this forum. Many of whom have not owned a steel trawler, but seem to have worked on steel boats at some point in their past. A newer steel boat covered in modern coatings and used in fresh water would be of far less concern to me than an older one used in salt. My area is filled with steel tug boats form the teens and twenties. (fresh water) (thick plate). My area is also filled with moisture damaged composite trawlers from the 70's, 80's, and 90's.
You can hear many opinions good and bad regarding all materials used in boat construction. If you answer the questions I asked you might get more useful responses. You also may not. Bill