simple
Mostly aesthetically, but also since Linux Mint is a very stable distro updates are usually slow and the packages it uses are often a little outdated. If you're the type of person to want to update to the newest thing as soon as it's out, then it's probably not for you.
Manjaro and Ubuntu have never really had perfect out of the box experiences imo, and as usual the Linux community loved to recommend bad starter distros. Even Fedora has some eyebrow-raising stuff like forcing you to manually install Nvidia drivers through the command line.
If you want something that "just works" I'd highly recommend ZorinOS or PopOS. They've got good defaults. Linux Mint is also good, but it does feel a little outdated.
I legitimately don't understand what they're hoping to gain from the AMA. Unless spez is going to start with "We were wrong, we're rolling back the changes" then there's nothing to be said. They ran over 3rd party apps that millions of their users use for no reason. This will be a total disaster.
I never really liked Twitter as a concept. It feels like it's built on an "old man yells at cloud" concept where people just shout their thoughts and nobody gains anything from it.
By comparison forums are there to foster discussions and communities. I thought Mastodon would be better but I spent 5 minutes and it's exactly the same nonsense.
You really don't need to care about whatever's happening with Threads as a casual user