And before anybody speculates too much about Matthias use of "jail-like":

I think this can make a lot of sense, because there are many situations, in particular in embedded systems, where you can and should confine at a much smaller scale than jails are really convenient for.

It will also be interesting to see if "Cells" can make inroads in the territory the original ACL abandoned, because writing the rules was so complex that it amount to parallel meta-anti-software development.

Hat tip to Matthias from here.