|Charlie Brooks RPG Superstar Season 9 Top 4, RPG Superstar 2015 Top 32|
Yeah, I hear a lot of people say "Starfinder is obviously just a trial Pathfinder 2.0." Along with "Alternity was just the 3.0 playtest" and "Saga was the 4.0 playtest".
Speaking of Saga, when the Dragonlance Saga card-based RPG came out, there were people (including a columnist for Dragon Magazine) speculating that it was a test bed for 3rd edition AD&D. So this stuff comes up pretty much anytime the maker of a popular game tries something new.
The "Saga was the 4.0 playtest" speculation is probably helped by the fact that one of the 4th edition preview books specifically called Saga out as an inspiration for 4th edition. However, I'm pretty sure the context was that they took lessons from that game and incorporated them into 4th edition rather than designing the game specifically so they could playtest a new version of D&D.