The steam turbine dates from the 1880s, and we wouldn’t have AC power without it. Still lots of cargo ships in service that are powered by steam turbines too. And of course, nuclear vessels use them.
Tesla was a genius his AC polyphase fundamentally changed the world. The first power turbines were hydro metallurgy wasn’t up to steam quite yet. Nuclear power needs to switch to supercritical co2 turbines for gen 4 high temp reactors. Co2 doesn’t react with molten salts nor molten sodium both of which are needed for fast spectrum reactors. Plus co2 being supercritical has lower compression requirements making a 50% cycle possible with out having to go to 1000+c like supercritical steam 600C works for co2. Plus the outlet temp is still above 100C so you can either run a organic bottoming cycle , or desalination plus district heating/cooling. Nuclear will be the last use of pure steam turbjnes. Combined cycle gas turbines are much more efficient but the bottoming cycle is either pure steam or organic fluid. So I guess combined cycle could also be the last of the steam turbines. Geothermal is going co2 vs steam it’s a better heat fluid and doesn’t leach minerals and radon out of granite rocks like hot water does.