I wanted to say just a few things.
As far as Pathfinder goes I believe it falls into the category of a self realized game. What I mean by that is it is a complete system. You have a multitude of classes, mythic level play, multiple monster manuals, and optional rules. It was to the point where NPC books were being done. There is a life time of adventure paths and rule books for Pathfinder. So, unless you do organized play you can stick with Pathfinder and have a complete system. It is the best version of the 3/3.5 rules set.
That being said from a publishing standpoint and planning publications it is not too surprising that Pathfinder 2 is coming out. It would become increasingly difficult to publish hardcover rule books for pathfinder which is over 10 years old. So new system opens the publishing schedule up again with new books for the new system.
Finally I remember the Pathfinder playtest and the playtest rules were allot different than the finale rules set. I think the finale version of Pathfinder 2 will have some major changes from the playtest. They have announced some already such as the skills. Legendary is +8. So I am very interested to see the Pathfinder 2 when it comes out.
just a few ramblings.
Yea. I keep thinking about how people forget history fairly easily.
Ten years ago there were message boards of people saying rogues were worthless (they're not), or if Paizo does this or that, they're making a huge mistake.
Guess what? It all worked out.