tulgurth:
As someone who does not play any 3.x or PF, I ask you a question to yours, Why Not?
Because my (admittedly limited) experience with PF has been "oh, it's everything I enjoyed about 3e, plus they cleaned up some of the things that I didn't." And while I understand the financial argument (the main reason I haven't gotten into 5e myself yet), the SRD has all of the core rules and more expansions then I'm ever going to use, all for free, so that's not an issue.
Swordchucks:
In a lot of ways, Pathfinder is 3.5 with an elaborate set of houserules on top. Just as 3.5 was 3.0 with the same and 3.0 was 2nd edition with the same.
Gonna have to disagree with you there. As someone who grew up on 2nd ed, I will attest that the change from 2nd to 3rd was far more radical than the change from 3 to PF. The core mechanic of the game changed pretty drastically; even the fact that you could now say that there was a "core mechanic" was a pretty huge difference from the days of roll high for combat (using THAC0), roll low for saves and proficiencies, and some classes have completely different rules to handle some of their special abilities (like thieves' percentile-based skills). 3e wasn't just house rules on top of that, it was a fundamentally different game that kept enough of the central concepts around that it could still be called D&D.