Star finder is okay from what I’ve read of it. It’s meant to be the same overall setting as PF (so you can take your spaceship to Golarion and slum it with the low-tech plebs or create a Many-esque body-horror spacestation sheine devoted to Lamashtu). Not as cool as Spelljammer from my brief glance, especially comparing artwork.
golarion is missing in starfinder afaik
Yup, it's a huge metaplot thing. Basically, there was an event called "The Gap", which lasted at least a couple of thousand years, but no-one is sure exactly how long, as the length seems to have varied a bit depending on place and person. Nobody has any memories of anything that transpired during the gap, and all records have been wiped, and it is implied that not even the gods are sure why or what has happened (and if they are, they aren't talking). And this period of "The Gap" ended about 300 years ago. There are (supposedly) some individuals that are extremely long-lived that remember things that happened before the gap, and they remember things after the gap, but they remember nothing in-between.
And sometime during The Gap, Golarion went missing, and nobody knows fucking why, or where it is, although it has been implied that the people that were on Golarion at the time are fine, they're just not.. there. It's weird. The fact that this is a huge mystery is a big part of the metaplot pitch in Starfinder, although it will no doubt remain unresolved as it is primarily intended as GM-fuel.
People just sorta woke up one day and had no idea about much of what had happened during most of their life, because it happened during the Gap and it had just ended. There's a lolhueg (although not actually that huge, if you look at the numbers) space station where Golarion should be, called Absalom Station, and it is the implied main "hub" of the setting (Or of The Pact Worlds, at least), and it was obviously in use and the people of Golarion just.. kept living in it, not knowing where it came from. And here we are, 300 years later.
From what I heard they had a falling out way back (after d20PFSRD started selling stuff themselves), and calling it Starjammer is just something they did to really double-obfuscate anything that isn't open content, as well as a nod to the pre-Starfinder Pathfinder setting material that the d20PFSRD people worked on, which was called Starjammer, and now has a Starfinder release. I don't know the specifics and it's just a mess.
