I hope ité─˘s awesome. I suspect ité─˘s going to blow.
Let me save everyone the suspense: it blows.
Exhibit A: the import dialog you get upon first launch.
Note the choices of mail clients from which mail and preferences can be imported.
Note that the number of previous versions of Eudora listed in this dialog is zero.
Remember that every single previous version of Eudora was backwards compatible with previous settings files and mail storage, at least enough that simply launching the new version made things Just Work™, which is of course the Mac Way™.
Ponder the number of people who will try this beta release who are not either die-hard Eudora users or Thunderbird users (also conspicuously absent from the import dialog). Hint: that number is somewhat south of both “significant” and “able to be counted on two hands”.
If your mind hasn’t boggled yet, you’re probably a lost cause.
To paraphrase Lloyd Bentsen’s most famous line: I knew Eudora. I used Eudora. Eudora was a friend of mine, and you, sir, are no Eudora.