Correction... second golden age. Remember Quake, and Loki, and RuneSoft, and LGP, Abuse (Crack Dot Com), Doom ported, Rise of the Triad ported, Heretic & Hexen ported, and a few others, all clustered around '98-'01 ...
We thought it was going to happen... and we worked to make it so. Back then, you could join in with ~200 or so folks to pre-order a boxed version of a RuneSoft game (early crowd-funding!!!) and they would use that money to pay their engineers to port games for us!
They would port for free (of contract fee) only using the pre-order money directly from the Linux gamers to keep engineers paid, and split the the royalties from sales on the Linux version, and for the most part, they were able to keep going that way! Of course that particular Golden Age collapsed with the "dot bomb" Internet bubble collapse.
I love where we are now, because there is an enormous selection of wonderful games of a wide variety of genre. In fact, what is not well-represented are AAA console ports like the very popular Modern Military Shooters (Call of Duty, Medal of Honor, etc). Since those aren't interesting to me, I'm not particularly bothered by that "shortcoming".