Disconnected:
ANC: A, B/C, and N are separate. Quite annoying for N passengers (CO, DL), as there is absolutely nothing in N--no lounges and only one small cafe (that admittedly serves decent halibut burgers). It's tiny and cramped, too.

I'm surprised to see BKK and LHR missing from your list. My memory is already fuzzy, but I think BKK might have some portions you can roam around, but good parts of the airport are separated. (Maybe not, though, except for a domestic departures area separated off from the rest of the terminal, which is all accessible to anyone flying internationally.)

And LHR has buses, but I seem to recall having to go through security after changing terminals, so are they landside? (Connecting from T4 to T5, it seems the hallway from the bus dumped us right in the middle of the main security area, but I'm not sure we could have exited out to the ground at that point.)

I should know this stuff, as I usually make it a point to wander and explore airports if I have a layover of at least an hour. (It's my exercise! ) At least in LHR, I had an excuse: I was too enthralled with the Concorde Room...