You can’t possibly have an interest over so many games, it’s not practical either. Even if you finish 100 games every year 2000 games would take 20 years.
I’m the same. I use it to basically bookmark upcoming or early access games so that I can receive updates about them on my news feed.
I don’t tend to buy early access games unless it meets very specific criteria: the developer is one person or just a few people, they have been posting frequent substantial updates (patch notes and such count, but if it has a ton of devlogs that are devoid of anything but fluff, I tend to stay clear), and the project speaks to me. Like if it’s a type of game I’ve always wanted to see made, or something.
All that to say, I have accumulated a large wishlist as well. Not as big as OP’s, but almost 150 games.