Currently our focus is on Loki given that we already have Prometheus integration and a Grafana dashboard, so it all fits pretty nicely.
Other options can usually be handled easily enough through either LXD’s log file or by having LXD’s syslog logger enabled and then capturing the log that way.
It’s not impossible that we may add other options down the line but we also don’t want to end up with a confusing set of options and a lot of individual options to test and validate.