A lot of old games have become unplayable on modern hardware and operating systems. I wrote an article about how making games open source will keep them playable far into the future.
I also discuss how making games open source could be beneficial to developers and companies.
Feedback and constructive criticism are most welcome, and in keeping with the open source spirit, I will give you credit if I make any edits based on your feedback.
Development is very much a “use what you know” type of field, especially at big game companies. Learning a new game engine is like learning a completely new programming language, often because you’re doing both. Every game engine has a scripting language, and very few use the same scripting language.