

Emulation is kind of in a legal grey area, and relies on the free labour of volunteers. Who’s to say that in 50-100 years’ time there will still be people able and/or willing to maintain the emulators? You could also argue that emulation is an imperfect reproduction of the actual gaming experience - emulators can both cause bugs or make the game actually run better than it did when it was released.
That’s pretty much how ancient texts survived. People would write to each other at the time, asking “hey, do you know that guy who has a copy of Epictetus’s Enchiridion? Could you have him send it to me, I’ll make a copy and send his back”. There are many ancient works that we know existed in this way because we have the letters asking for them, but the actual text of the work didn’t survive.