Re: I've recently seen a current version of Outlook...
Microsoft went all-in with better quicksearch over threading, topics, manual organization and tags, etc, after Google completely blew away the idea of manually organizing mail for most of the population. It turns out that only about 1% actually care that much, the rest just want some way to access it. Granted Office 2007 sucked balls in almost every way, but most of the Outlooks since 2010 have been relatively solid if you don't need it to act like a 90's Usenet reader.
It is obvious that investment has stalled for a long time, though; the answer to most Outlook feature requests has been "Use Sharepoint!" for a decade now. Great, now I have two problems.