Required online connection is not problem for me at all. My gaming computer always has it.
I play using HOTAS and pedals, so I don't imagine myself taking all that stuff together with my laptop on any trip. I can fly without HOTAS, but not without pedals. I leave simulators for my stationary computer and play chess, checkers, go, solitaire and alike on my laptop.
Also, multiplayer mode is essential for me as I don't fly offline. It is boring for me to fight AI and I always find novice human pilot to be more interesting than high level bot. In fact I won't not buy any combat flight sim, which has no multiplayer mode.
I think it is obvious, for what I have voted.