simple

You really don't need to care about whatever's happening with Threads as a casual user

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but also since Linux Mint is a very stable distro updates are usually slow and the packages it uses are often a little outdated.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.

It's browser based which means there's no bare metal CPU or GPU calls in can make.

Here's hoping WebGPU can fix that in the future.