Minio is more or less feature complete for most use cases. Actually the last big update of minio removed features (the UI). I am using minio for 5 years and haven't messed with it or used any new thingie for the last 5 years (i.e since I installed it); I only update to new versions.

So if the minio maintainers (or anybody that forks the project and wants to work it) can fix any security issues that may occur I don't see any problems with using it.