FreeBSD 16.0-CURRENT lives! And I now have a FreeBSD stable/15 branch on my laptop, which will be landing in the git repository shortly; I forgot to ask the git admins to allow that branch to be created (we have an allowlist system to avoid accidental pushes).
Please download and install on new systems. Upgrading existing systems will be challenging; freebsd-update won't work and pkgbase still has some sharp edges.