So you can traffic filter and manage (using ALTQ no doubt) traffic on the default route both inwards/ingress (block in on egress …) and outwards.egess (block out on egress …). Everything else is a matter of local policy.

Obviously this is very useful for a laptop changing between wired and wireless, but maybe not so useful for a fixed server.

I think you can do something similar with Tables, but you need to chain a rule to an interface and point it to another, and that shit will send you blind just trying to work it out.

pf is much easier to configure, and with this function it should be cool. Does it also support ingress? That way you could have default lists for any sort of interface, both inbound and outbound traffic.