I don’t get why displaying nick@domain is preferred over just @nick in the first place. The twtxt world here is so small (and hopefully will always be) that duplicate nicks are just not an issue from my point of view. And even if there are several feeds with the same nicks, one probably does not follow both of them. Yes, there’s the birthday paradox, but I’d guess we have a slightly larger nickname space than days in a year.