Yeah, Westworld is back after a 2 year hiatus. Got hooked on it and watched Seasons 1-3 while I was subscribing to HBO in order to watch GoT.
Episode 1 of Season 4 just aired a few days ago.
Not an HBO subscriber anymore but I already watched it and it doesn't offer much; just lays the groundwork for the coming season which finds at least 3 escaped androids - Dolores, Maeve & The Gunfighter - loose in the "real world" while William ("The Man In Black"), who may now be an android himself, apparently is still obsessed w/finding Maeve (and presumably Dolores too).
To what end is still unknown but he starts off Season 4 where he left off in Season 3 by killing or having people killed in order to discover some secret that he thinks was hidden in Westworld when it was created. Not sure what was left of the Westworld (after Season 3) but, even if it's "gone," that's not stopping William from his "mission" whatever it is.
I'm going to have to rewatch all or some parts of Seasons 1-3 to get back up to speed with this very complicated show.