It's a resonably sensible change. I wouldn't be surprised if they extend it to images etc (on a longer timescale) as I keep seeing people hosting images off discord...
Half the time when I click an image link hosted on Discord, it turns out to be a dead link. I hope this new policy will help make them dead-er so people can finally stop using them. Discord isn't Imgur, Jesus.
Oh so the files will still be hosted by discord, just the url to then will be changed every day. That makes a lot more sense but also locks you more and more into discord. Although I suspect if you are hosting meaningful files on discord then you don't care about vendor lock in.
I guess so, it depends how they are treating them though. Image files (probably) are not being used to distribute malware and are going to create a lot more dead links.
Is this change live? We could probably test it. (Re read the article - not yet)