This subject is very interesting to me also. I've been using Outlook for years and like organizing the folders, searching, and just the way it appears on the screen.
Recently my Outlook conked out after a restart, and I had to re-do the account settings. Discovered that Google considers Outlook and other "desktop mail clients" to be lacking in "modern security standards." To continue using it, I had to allow "access for less secure apps." It could only be set up with POP3 rather than the more mobile-friendly IMAP.
I've evolved to Google for contacts and calendar over the years. So I may - reluctantly - just give up on Outlook and save emails by topics in the Gmail folder system.
I like my desktop computer for writing projects and organizing my documents when we're at home but find that I use the tablet and phone now vastly more for email and net surfing, at home as well as while traveling.
