I have been using Microsoft Flight Simulator since 2003, it's just excellent. When you compare it to flying to real life the forces are almost the same, skip feedback. I would say that MFS is pretty much the best simulator for anything out there.
The main problem though like with all simulators, it's a simulator. You don't really have the same point of view. I can't "turn" my head
in the sim like I do in a real plane. I can't "feel" the G-force. I can't "feel" my orientation and adjust like in real life, a must for smaller planes. I can't squint through the window looking for traffic. And this doesn't get solved
with the level-D simulators that cost 40 million dollars, those distort you're vision of the real thing even more.
As for sailing, it's even harder. There is less "technical" stuff like there is with flying. All you have is the wheel
and a couple of winches. A chartplotter
and an autopilot
max. Sailing is more about "feeling the boat" and "feeling the wind" and "feeling the spray.
What do you think?