Outlook 97,98,2000,XP Were all utter crap.
Outlook 2003 is all that and a bag of chips. Stable, very fast, and has some features I have wanted. I have 12 IMAP, 2 POP3, and 1 Exchange mailbox running from my outlook 2003 currently. full rule sets, and archival features working and in lightning speed. (that kinda load used to crash XP)
Oh and my outlook archive folder and main pst total have I think 1.5GB of email in them. Somewhere in the 80,000 - 100,000 emails range. Every email since 1997, and still Outlook can search, and find the emails I need without issue.
you go on believe'n that 20% of the web traffic comes from Moz or Opera
If it broke 2% I would be impressed. As long as I cant see that they are out there (because of them mis representing what browser they are) I will not code for them.