Comparison with UE - worldscapes/engine GitHub Wiki

This page covers the advantages and disadvantages of using the Engine against UE4 (as an example of a modern production-proven solution).

Unreal Engine 4

Has a mature developer base
Has lots of information, shared experience
Built on common and well known OOP patterns (described better in the About section)
Lots of integrations with different technologies and tools
Editor simplifies development and allows to get quick visual feedback after changes
Blueprints allow easy content addition after all mechanics are created with C++

OOP is easy at the start of a project, but with size, it grows in complexity a lot
Does things in its own way, which is not that customizable for specific projects and forces to change development perspective
It's not easy to implement Client-side plugins (or is it?)
Classes include lots and lots of features, many of which are not needed, but still complicate the project and greatly increase loading times
Complicated networking makes it hard to tell which code runs on server vs client + mixes networking aspect with game logic

Server-side first approach allows to avoid many networking bugs and be more focused on feature development itself