There are still people developing efficient and capable game engines. Godot[0] is a good example of one that has achieved widespread success. It's a few dozen megabytes in size, does 2d and 3d, supports VR, and can target Windows, MacOS, Linux, Android, iOS and HTML5/WebAssembly. It's open source and free as in beer too.
[0] https://godotengine.org/