If you go with copy-left you automatically disqualify some major institutions from using your software. Especially for a community based project, there may be institutions that want to make proprietary extensions so it can integrate better with their existing infrastructure.
Generally I think MIT is a good default and you should only use a different license if you have a strong case for why MIT doesn't make sense for your project.
Generally I think MIT is a good default and you should only use a different license if you have a strong case for why MIT doesn't make sense for your project.