None of these are realistic, if you have to use third_party software, because that one may require them, and then all bets are off. The only way to enforce thi

None of these are realistic, if you have to use third_party software, because that one may require them, and then all bets are off. The only way to enforce this, if you are in full control of the source code you are in - for example the Game Engine / Runtime may fall into this, but it's impossible, or rather impractical to think you can do for the rest of the Game Tools / Plugins / etc. So with this comes conundrum - folks working predominantly on the Game Engine side tend to push this "orthodox" style as the one that should be accepted, while the folks working on the "tools" style simply can't accept it, because otherwise we have to reinvent tons of code, or not being able to link to closed-source third_party libs in order to make a tool. It's bananas, and wishful thinking.