I think this may actually be the case though? Think back to the early 2000’s where video game symphonic concerts were getting played on G4, and Tommy Tallarico made claims of the largest audience for a symphony.
Video game symphonies just weren’t popular after that from the end of 2009, honestly even 2008 maybe, all the way through just a couple years ago. The numbers for symphonies are starting to grow again, but far beyond and in much wider breadth of what it once was because of how much good music games have now.
I think it may actually be quite accurate, it’s just an already niche subject. If you didn’t know about them in the early 2000’s then it’s easy to think this is the first time they’re getting recognized, but that’s not the case. It’s just been a couple decades.
Edit: to clarify - I do think video game music has mostly been popular, I more mean specifically about video game concerts/symphony performances. They were big, really big (for the relatively new medium of video games). Then they died for 15 years. Now they’re coming back.