I haven't used EGS in 5 or 6 years, but the whole reason I refuse to use them (aside from the timed exclusive bullshit) was no offline mode when I wanted to play subnautica. I remember being so mad that I couldn't play my game when I lost Internet that once it was back I bought it on steam and uninstalled EGS entirely.

So not sure how much of their library is actually drm free if you can't play a game without being able to contact their servers. But who knows, maybe EGS finally got around to adding basic features after all this time.