Have used Classic Outlook since day 1 and it simply works for me. New Outlook does import contacts but has no Tasks function, and no way of importing my existing calendar and mail boxes - it's just not a usable alternative. No File button for the imports!
If these problems aren't solved by the April 2026 deadline, I'll simply have to stop using Outlook and start relying on Google Mail and Calendar- or take a deep breath and try moving to Thunderbird. Outlook is by far the main reason I have a MS 365 sub, with occasional use of Excel and Word. I'm thinking of moving to Google Sheets and Docs for those uses if Classic Outlook ends with no usable New Outlook in place - and dumping MS 365 altogether.
There must be a huge number of ****ed off Microsoft customers in the same position. Microsoft - please get your act together and issue a complete working New Outlook ASAP!