You still need to sign up to/log into Threads (via Instagram) to have a Threads account or be active on there though, so what makes it theoretical? If they counted all Instagram accounts as Threads accounts it’d instantly be in the billions surely.

Yet another reason to be annoyed about Brexit

I didn’t see this until just now! No notification outside of the app, my inbox inside the app got a (1) unread icon when I refreshed earlier.

Notifications have been very spotty for me on Jerboa (not tried the others) but they are implemented. Just not always effectual for some reason.