It's a reference to [1] and a mindset arguably most common in the gamedev world that emphasizes simplicity, pragmatism and performance (including compile time performance) over many aspects of "modern C++". I've found it useful and productive, YMMV.

[1] https://gist.github.com/bkaradzic/2e39896bc7d8c34e042b

That's an interesting (and I think worthwhile) read! Just how much it upset the denizens of r/cpp[1] is a sight to behold:

> This starts ridiculously, then it gets worse

...

> looks like a solid way to produce abysmal quality code

...

> just learn the fucking language like everybody else

...

> The trolls from r/javascript are brigading us again It seems

1: https://www.reddit.com/r/cpp/comments/41b3o3/orthodox_c/