Pathfinder 1E vs D&D 5E
Urgh...okay so the "Waah they turned it into an MMORPG" thing is one I've seen fairly often when it comes to Fourth Edition. But think about it - most MMORPGs (and plenty of other games) are, at their heart, based on DnD. Back when DnD first started, it was like playing an ARPG like Diablo or something - Go to town, find important NPC, get quest, find dungeon, enter dungeon, kill monsters, get to bottom of dungeon, kill boss, get loot and exp, return to town, hand in quest, sell up, etc, go to next town, repeat. As I understand it, there wasn't so much "proper" RP back then, it was more a case of "Okay so we're doing X dungeon today, which character are you gonna bring?".
Fourth Edition just gave names to the roles the classes filled - Defender, Striker, Leader, Controller. But I mean, even in the early days, you had a Cleric for heals, you had a Fighter to tank or whatever, and a Wizzy to do, like, everything because Wizzies were OP. People wouldn't go into a dungeon with five Rogues - you'd need a bit of everything so you could deal with any likely problems that might need dealing with, be they traps, combat, whatever. Fourth Edition did not "turn it into an MMORPG", it just maybe made it more obvious that the two have similarities. Because they do. Because DnD was created and then when computer games/tech/the Internet got good enough, computer game devs were able to basically make computerised-DnD-but-it's-not-called-that-because-copyright where you could log on to a server and group up with your friends, go to a town, find a quest, enter a dungeon, kill the monsters, get the loot, go back to town, sell it...