I make a judgement call. If I think what I get in the box is worth what I'm paying for it then I will buy it. What essential component do you think Maxis are holding back that they will make you pay for in the future?
I don't know, I haven't been following Simcity specifically, my interest lies more in the bigger picture, long term consequences of this sort of thing. I replied to you originally because you were trying to dismiss people's legitimate concerns which I felt was unfair.
To try and answer your question anyway though, I think they've missed out subways, it seems such a glaring omission would be either due to problems in development or a preconceived plan to offer this arguably essential content later for a price.
Basically, when it comes to this sort of stuff, if you only consider the specific case at hand and ignore the downside 'as a one-off' then things get worse for everyone first and eventually yourself as the effects of this creep into more and more things to a greater and greater extent, by which time, it's too late.