To me the golden era of gaming was about 10 years ago. Game engines weren't designed to make Hollywood blockbusters (see the current Battlefield engine and series). They were easily moddable. Maybe not surprisingly from that era came Team Fortress Classic, Counter-Strike, Desert Combat (the precursor to Battlefield 2) and mods you've never heard of like Tribes Football which anticipated Rocket League by 2 decades.
In other words, almost everything that exists today existed a decade or more and probably had more features. The current business model favors locked-down engines that have semi-regular releases of DLC or an entirely new game every year or two. This is horrible for building communities and pushes publishers to neglect games.
A more open view of game development would avoid a lot of this constant reinvention of the wheel and should create better content.