+* "busctl status" works only as root on dbus1, since we cannot read
+ /proc/$PID/exe
+
+* systemctl (and possibly related tools): support a new switch that
+ allows enumerating units in local containers recursively. "systemctl
+ list-units -R" or so should not only lists on the host, but also the
+ services in all containers in a pretty way, to give an overview of
+ the entire system. Also, maybe add "systemctl list-machines" which
+ works like "machinectl list" but includes information about the
+ health status of each registered machine. For that we should
+ probably implement something that encodes the system health status
+ in a single enum state, i.e. something like a system-wide state
+ starting → running → failed → stopping, that is based on the current
+ job queue and a check for failed services. Maybe then change
+ "systemctl status" without args to output this state along with a
+ selection of other data, such as the uptime or so.
+
+* generalize ConditionXYZ= logic and make it available in networkd's
+ .network, .netdev, .network files, too. This is particularly useful
+ to match on containers with ConditionVirtualization to
+ conditionalize network setups for containers
+
+* doc: remove documentation for .include, drop-in snippets are the
+ better replacement.
+
+* Add a seccomp-based filter for socket() calls to limit services to
+ specific address families (for example: AF_UNIX), inspired by
+ Android's sandboxing
+