Discord links are so weird. You can create an invite link and set it to never expire, but they still seem to go bad anyway.
Here's a new one: https://discord.gg/cy66Fa5
Apparently War of the Spark was one of the biggest booms in MTG we've had in a long time. Arena brought a lot of attention to the game, but I hear that it also spiked paper sales and whatnot.
Unfortunately, all of that progress was probably lost during the pandemic. Local game stores are dropping like flies again.