Re: Lack of integrated email/contacts/calendar?
Agree. As a small business owner, I'm fine with the Open Office suite (plus LibreOffice) to the extent that I have not upgraded Windows Office since '97. But the lack of a contact manager from my veiwpoint has been a serious omission for years, and has inhibited migration to Linux. Some add-on solution which is not part of the "official" suite would take time to evaluate, and might disappear the day after I migrated.
I may be "wrong" in the eyes of the experts, but with limited time to address these issues, that's where I am. That said, the latest Windows offering are so unattractive that the next move may well be Linux.