Relieved I was able to claim my username on Discord, annoyed I even had to do it in the first place. Especially since my Discord profile shows what name and discriminator I used to have anyway, making the whole thing seem even more unneeded than it appears to be?? So most people who are valuable targets for impersonation are going to list both their new discord username and their old discord name with discriminator in their online profiles to avoid any issues anyway.
Phew. Tiresome company, this Discord.