I use bsd containers for everything but home assistant on my home server and love them! The downside for most people at the moment is having to set them up manually. I can export the thin jail and move the archive across computers as backups and the fine tuned control is beautiful. FreeBSD offers a way to check for security vulnerabilities in installed packages (pkg audit -F) that I run as a cron job and email myself daily to check for needed updates.

Problem is most people want a single docker install and it’s all set up, not something that needs manual configuration. Bastille has templates that can do this for bsd jails but there’s not a lot of services with templates.