It's a hard sell for me, considering Factorio has a ton of actively developed mods (cough Space Exploration 0.7 cough), a demo, and in early access era it's cheaper and insanely polished.
From a quick glance, I'm not sure whether it's a fun game or not, as realism tends to be not fun. Requiring an internet connection for map tiles also sounds not good for offline play.
Well, I'll wait for reviews when it's out before deciding then.
This feels something closer to Puffin Planes ($12), Rail Route ($25), Station Flow ($18).
The difference between $25 and $30 isn't too much, but there's another significant hurdle to get up to a perceived $40 value.
It does look interesting, but for a purchase at that price point, I'm going to need to feel that its worth more than a weekend or two of gaming and something that will be a game that I want to pick up again after a month or two away from it.
https://store.steampowered.com/app/1124180/Rail_Route/ is pretty niche (and is in my library) ... and its $25, which is a fair bit less than the $40 price point planned for Steam. https://store.steampowered.com/app/1134710/NIMBY_Rails/ NIMBY Rails is at $19 (also in my library).
It could very well be a great game... though that price is one that's setting the expectations for it high.