I think yes because having to manually go and create a room is more time consuming, but the trade off is having dead sublemmys creating dead chatrooms, particularly because domain camping on matrix is a problem. (ex, I bet #sex:matrix.org is a room on matrix with minimal/no activity)
A loosely moderated place to ask open ended questions
If your post is
it’s welcome here!
I’m also not sure how this would work from a technical perspective. Would community creators have to share their Matrix credentials with their Lemmy instance/client? Would the Matrix room be created by a different Matrix account managed by the Lemmy instance maintainer? How would it work if the Lemmy community creator wanted to use a different Matrix homeserver than matrix.org? What if a space was better suited for Matrix than a room? How would the community maintainer change the room in the future? What if the maintainer for a community switches and the new maintainer doesn’t have access to the account that is running the Matrix room?
I’m not sure if this is already available, but I think a field to enter a Matrix room/space link would be better than the ability to automatically create a Matrix room. It would give the community creator more flexibility and creating a room/space doesn’t take too much time. If a person is going out of their way to create/maintain a Lemmy community, they should also have the ability (or the ability to figure out how) to create a Matrix room/space.