I’m not sure that is entirely fair. Sure containers like LXC and bsd-jails existed, but I think the feature that won the hearts of devs was the incremental bui

I’m not sure that is entirely fair. Sure containers like LXC and bsd-jails existed, but I think the feature that won the hearts of devs was the incremental builds that let people fail quickly in a forgiving way. With jails, the best I know of achieving this is creating a base jail filesystem (thin jail), and creating a new one. (Apologies in advance if another tool addresses this).