I think the last time realm first achievements were a thing (for anything other than raids) was in Lich king, but I might be mistaken.
Since I wrote my previous comment, I thought about it, and there are advantages for starting earlier. Reaching max level gives you access to world quests, which can be a source of gear and reputation. It also leaves you more time to complete the weekly objectives before the next reset. If I recall correctly, last time (the launch of Dragonflight) you got an item you can use to increase the power of a piece of crafted gear.
For the average player it doesn’t really matter, but for the world first racers, it might.
It’s not a normal epic exclusive, like Hades, for example. Epic didn’t just paid them to keep the game out of Steam (for a time), they financed the while game. Developers of “normal” exclusives get money to release their game, already under development, on EGS first. Alan Wake 2 is different, it wouldn’t exists without Epic games.
Look, I like my steam library as the next guy, and would be happy to have all my games there, but in this case there is literally nothing wrong with the game being only available on EGS. Would I prefer to have it on Steam? Yeah, of course. But I also very much happy to just be able to play it, and if I have to do it on Epic, well, that’s really not a big deal.