I'm working on a project I hope to make multiplayer eventually, but the issues surrounding it scares me a bit. I wish more companies doing the hard multiplayer

I'm working on a project I hope to make multiplayer eventually, but the issues surrounding it scares me a bit. I wish more companies doing the hard multiplayer work (fps's mostly) would reveal more of their back end and how they do things. I don't think anyone has really done it well yet but everyone is hiding what they have figured out so far. I have noticed that certain engines tend to have better success at this, for example source engine seems to have drastically improved, allowing games working on this issue like Insurgency to make some noticeable strides towards being better. This has me remembering UT over dialup lag...