Rich, new file and sharing experiences throughout Microsoft 365, now in Microsoft Teams

Alex Egharevba 

I think there will always be a place for standalone sites either as corporate intranet or departmental sites. We'll always need a place for general communications, department news(letters), policies, procedures, org charts, etc. that broad swaths of the population can get to. I just created a site the other day for a group as a place to post monthly financial reports for other people to use/update. They don't collaborate on the reports, there's no Outlook traffic or other needs beyond just uploading the reports so they got a standalone modern team site. If the site purpose changes, they can always add Team functionality later.

In fact, that question - how much Outlook activity does the group have with emails, meetings, etc. - is the fundamental one that tells me whether to suggest a stand alone site (either classic or modern) vs Teams.