I think I know where in the code this could be happening for the web UI.
I’m not one of the devs but I’ll look into this a bit, I’ll update this comment when I get more info.
I believe !
should be changed to [!@]
in this line
https://github.com/LemmyNet/lemmy-ui/blob/129fb5b2f994e02bfecc36e3f6884bdbf485b87a/src/shared/config.ts#L47
And another elseif(match…) needs to be added for @ after this line
https://github.com/LemmyNet/lemmy-ui/blob/129fb5b2f994e02bfecc36e3f6884bdbf485b87a/src/shared/markdown.ts#L127
This is great for the cat-and-mouse situation.
I know a lot of people use Plex because of the number of apps on various platforms. The renewed life in these apps will be at least one less reason for people holding off on Jellyfin.