Trust me, I’ve been around long enough to have heard most engine talks. The biggest issue being that you’d have to “re-invent” elsewhere. You could sit down and learn something new, or you could stay where you feel comfortable. There’s nothing wrong with either of the two.
Sure the W3D engine does what we want right now, but look how long it’s taken our small community to achieve. While there’s only a handful of us here, UE4 for example, has tons of people using it and “re-inventing” new things. That’s just the way the industry works. Most games will always retain a group of people that are dedicated to sticking with what they love.
At the end of the day, a lot of fans who have followed the games for years would want to see it remade with better graphics, gameplay, etc. It’s why remakes are so sought after these days. You can’t blame people for nagging about wanting the game to go somewhere that’ll draw in more attention. RenX proved that with the initial wave of people swarming to play.