I think live play podcasts and shows might help also. I'm a big live play DND/ttrpg listener despite having never played in person with people. I bought it pretty much instantly and I'm loving how much it feels like those podcasts.

I know CRPGs based on ttrpg mechanics still hit with people back in the 90s and early 00s but I'm guessing it wasn't the selling point. Like I'm pretty sure people didn't buy Fallout back in 97 because it used a system that was similar to GURPS.

The Adventure Zone podcast by the McElroy brothers came out in like 2014 and the live play podcast genre skyrocketed since. Pretty much every podcast network has at least a few DND shows plus a few more using other unique systems. There's even podcasts parodying live play like Offices and Bosses, an improv comedy where they play fantasy monsters playing DND with human characters. Theres no way people would have come up with that format before the adventure zone.