I'm guilty of writing unmodular / procedural code, and I should know better… I've been coding for decades now.

Anyway, I agree that making the code readable is the holy grail of elite programming.

If you know Unreal Engine 4, why don't you try to emulate some of that functionality using OpenGL 4?

if(0…

Small games like card games or some simple games like up to the complexity of minecraft don't matter which language you are using. It depends on how good your deployment process is so do customers get an error message because they don't have certain runtime installed or is your setup script clever …

Game Developer Roadmap - 2020: https://github.com/utilForever/game-developer-roadmap