A friend of mine said he found it very useful on smaller screens to avoid having a bunch of windows taking up space

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.

This has gotten me thinking about legal deposit requirements, such as those that have existed for centuries in certain countries where published works must have a copy submitted to a national library for conservation purposes. Does anyone know if there are initiatives like this for video games? How are they going?