Thank the invisible pink unicorn that the only immersion I need is from the cockpit.
But strong replay value I agree with. That's why I go for the most dynamic and ever changing style of play there is, playing against humans. The replay value changes every single second of every time you fly.
Bliss, we've been around this block plenty enough. But, once again:
Not everyone has the time or inclination for multiplayer, and in my case, that's largely due to the times I play (very late at night, Pacific Time).