Magic Arena isn't the 1st attempt from Wizards of the Coast at making an online card game, before this we had aptly named Magic The Gathering Online.

The game... well, we can say it works, and it manage to reproduce the card game experience... if in a clunkier way.

The advantages are you have access to far more cards there (Arena only have the most recent expansions) and you can sell your collection and regain some of the money you lost in this expensive hobby, just like the paper card game.

Though I always say if you are jumping on a hobby already thinking on the way out perhaps this is not the hobby for you.

Slightly unrelated but I always wonder how much people regain from selling their collection. I'd be surprised if you get as much as 50% of your money back.