They didn't abandon it, you're intentionally ignoring the mail client they included with Win7.
Ok, maybe you can explain how it's the same. My understanding is in order to use Windows Live Mail, I have to login to windows Live. So since I use 5 gmail accounts for email, I will end up duplicating all the email i have on gmail, on Live. Is that right ?
What I used Outlook Express and Vista windows Mail for, was to get my email from mail servers on to my computer. When Gmail came along I decided that having access to my email on gmail.com too was ok, sometimes even useful.
I don't see anyway that having all my Gmail on Live is in any way beneficial. I don't need a second Web based location for all my email.
And as per usual Microsoft design, Windows Live Mail does a bunch of stuff I don't want. I don't need a new way to send photos via email, the old way works fine. I don't need a new way to sort email into folders, I have always done that using rules. I don't need facebook integration in my Contacts, my Facebook friends aren't the same as my email contacts.
The ribbon interface is incomprehensible to me at first glance. I assume it's possible to find things that used to be in the tool menu for example, but I can't figure out why things are where they are.
The calendar idea is ok, but does it work with Google calendar ? If not it's not useful.
Underlying all this is the knowledge that the old useful Windows Mail actually does come with Windows 7, it's just hidden and disabled. It's so blatantly obvious that MS wants to force people to use Live, not because it's actually useful, but because of the potential revenue stream, either from advertising or subscription based OS..
It would have been fine with me if MS never put an email client in Windows, or a browser, or fax, photo browser, etc. It's really annoying that they just decide to drop things though. Particularly when it's driven by their attempts to coop somebody else's better idea, like Gmail. They aren't content to compete on a level playing field, they have to drag OS functionality in to the fight at the expense of their customers.