Legacy vs Evrima

Hey all. I’m pretty new to The Isle, I’ve been playing on Evrima since that’s where everyone says to go and it’s the newest and getting updated. However I’m already fatigued of seeing the same dinos. So it has me scratching my head….. why was legacy ditched when it seemingly had more dinosaurs and content? Feels like they restarted from scratch instead of just putting the work into updating a single version of the game. And for what? Slightly more polish at the cost of a plethora of playable dinos? Why not just tlc them instead of trashing it all? Wouldn’t it be less work? It makes no sense and when I ask players in-game, a war starts and everyone contradicts their opinions on it. It’s just confusing to me. Also I’ve seen people in chat say that Evrima is a beta and not the actual game? Then the question becomes why are they updating the beta instead of the actual game? So then what IS the actual game?!?! Thanks any clarity would be cool.