Not great things, but she did make it.
https://store.steampowered.com/app/305960/Dragon_The_Game/
Not sure if the original dev is still involved, but the team has also renamed their company a few times and released (and abandoned in a somewhat broken state) a few other games.
Maybe not an eli5, but lots of reasons.
There’s no stable, consistently updating client that everyone agrees on, the real ‘emule’ client hasn’t been updated in over a decade. Once you get past that hurdle, the setup is also a lot more cumbersome than other file sharing options. The network also has kind of a bad reputation because there’s not a great way to see if you can trust a file until you’re finished downloading it and people definitely do take advantage of that.