- Are there downsides to having two SharePoint sites associated with the same Team?
[Fred] This question is a bit unclear. I'm not sure if you meant associate two SharePoint sites into Teams but the idea of "Teamify-ing" your site means you're users no longer have to be particular about nuances of navigating within SharePoint.
I'm going to assume here that the question from nutritiousregulator may have been from a misunderstanding of Bob's post .. i.e. that the when the Team is created it is possible to have more than two sites associated with the Group.
Modern Team sites , around mid 2018 , for historical context when created would also cause the creation of an O365 Group (but not automatically with a Team in MS Teams).
When an O365 Group is created a Team Site is created (however, a Team is not automatically created AFAIK)
When a Team is created , an O365 Group is created and the Team site is created automatically.
So on setup - The Team does NOT get associated with 2 Team Sites (via association with the O365 group)
the benefit of Teamifying the Team Site is to provide a Teams UI for a Team Site that may have been created at a time before Teams was well known by the user community. Team Sites officially pre-date Teams. It is possible of course, that a decision was made to create the Team site without a Teams UI because the users haven't been trained on Teams, or people are so wedded to Outlook that they don't want to use Teams for comms/collaboration.
In relation to associating the Team with a second (or more site) .. It is possible to link to SharePoint sites by using Tabs within Teams and this permits you to display SharePoint pages within the Teams UI.. for example this could enable you to add a tab to the Intranet portal site (or a communication site) within the general channel in Teams.
HTH.
ps: I forgot why I landed here in the first place :smileyhappy: .. when are we going to see the https://www.microsoft.com/en-us/microsoft-365/roadmap?filters=&searchterms=SharePoint%2CTeams feature ? and what will it/does it look like ?