Please review the EOL / EOE announcement publicly posted at
sylabs.io
SingularityCE 4.6.0, which will be released shortly, is expected to be the final release managed by Sylabs. As always, the code remains available under an open source license. The 4.6.0 release will also incorporate code that was previously part of SingularityPRO only. However, security, bugfix, and feature development will no longer be performed by Sylabs.