Not meaningfully. AI-guided reverse-engineering is very effective.
This also isn't relevant to third-party code obtained under license. It is a de facto restriction on code dependencies, which may significantly increase development costs.
While AI isn't particularly good with obfuscated code, it is true that code obfuscation in most old games can be removed relatively easily. The attack and defense state-of-the-art has moved on from those days.
This also isn't relevant to third-party code obtained under license. It is a de facto restriction on code dependencies, which may significantly increase development costs.