Well, you can't please everyone....
I have been using Eudora since '93 and still love it. But then again, I am still using (and loving) the Agent newsreader, since '92. Many have come and gone, but after all these years nothing beats Eudora. I find that the filters are better on it, and this is very important with all the email I go through. Last I looked, my "IN" mail folder was around 430mb :Q And with over 100 message rules. In other words.... I am stuck with Eudora
BTW: For the advanced user, Eudora has an .INI file that you can really tweak and customize. One could spend a week re-configuring things that are not available in the normal "options" window.