doctorbadwolf
Heretic of The Seventh Circle
I think the second two are the big ones, personally. IME, people play the crap outta races that aren’t mechanically powerful as long as they are interesting in some other way.They seemed more common. There are probably several reasons for this.
1) They were more mechanically appealing. (Ability Scores were more important and for a while I think they were the only way to get bonuses to Str and Con which were important for certain types of Fighter or Barbarians)
2) They were more front and centre. They appeared in Players Handbook 2 alongside classic races like Half-Orcs and Gnomes and classes like Barbarians and Druids.
3) The default setting was the Nentir Vale so everything was new. There was no long history of the setting without Goliaths.