I've read some of these suggestions multiple times over the last years of Factorio development, but here are my two cents:

1. Railway bridges
Non-intersecting railway crossings were suggested by many people. While this will add a lot of comfort to the game, it is technically quite challenging as ...

Ojelle wrote:And whats the potato mod?

Probably adds 9gag support.

but there is no alternative to this. so they either do it this way or they don't add a lobby server.

There are more possible alternatives to choose from:
No lobby service at all. Current state.
Add a lobby service, make it mandatory for joining any multiplayer game and enforce authentication ...

This is an anti-piracy change, but in a different way than AAA games do it - we don't use DRM (apart from Steam, but you can still download the game from the website) that would disallow you from playing the game, we are just hiding some of the more advanced features, that require further use of ...

Fusion reactors would be a great addition to the late game, but should require some additional infrastructure to not make them overpowered. Fusion reactors consume heavy water (deuterium and tritium) as fuel, which has to be extracted from water in special plants.

For the waste and pollution topic ...

As others stated, three minutes isn't that bad for a complex C++ project, especially in Visual Studio. In our largest project, I actually managed to reduce compile time on a quad core I7 from 25 to about 5 minutes just by optimizing the includes, especially not including Boost where it's not ...

Just a small fact which left me wondering: in the FFF you state that the algorithm takes a lot of iterations for long and complicated paths, which don't really fit inside a single 1/60s game tick. As Factorio already supports multithreading, wouldn't it make sense to calculate the path fully ...